Ye shall not round the corners. It clearly appears that God had no other object than by the interposition of this obstacle to sever His people from heathen nations. For there is nothing to which men are more prone than to conform themselves to the customs of others; and hence it arises, that they mutually communicate each other's vices. Wherefore care was especially to be taken lest the people of Israel should adopt foreign habits, and by this pliableness should fall away from the true worship of God; from whence too the ordinary phrase has arisen, that the word "common" should be used for "unclean." God then strictly forbids them from declining to the habits of the Gentiles, and confounding the distinction which He had Himself placed between them. There is no doubt but that it was usual for the Gentiles, out of superstition, to cut marks [1] upon their faces, to trim the hair in certain steps or circles, and in their mourning to lacerate their flesh, or to disfigure it with marks. It is well known that the priests of Cybele [2] made gashes in their flesh with knives and razors, and covered themselves all over with wounds, for the sake of shewing their zeal. The same thing was also commonly practiced by others; inasmuch as the world is easily deceived by external ceremonies. But though this were a thing in itself indifferent, yet God would not allow His people to be at liberty to practice it, that, like children, they might learn from these slight rudiments, that they would not be acceptable with God, unless they were altogether different from uncircumcised foreigners, and as far as possible from following their examples; and especially that they should avoid all ceremonies whereby their religion was testified. For experience teaches how greatly the true worship of God is obscured by anything adscititious, and how easily foul superstitions creep in, when the comments of men are tacked on to the word of God. Doubtless that part, "Ye shall not make any cuttings in your flesh for the dead," etc., might be expounded as a correction of immoderate grief; because we know how intemperately men set themselves against God when they give the reins to their sorrow; but since the object of the Gentiles was to pay what was due to the dead, and to celebrate their funeral obsequies as a kind of propitiation, it is probable, and more suitable, that by the whole context those preposterous gestures are condemned, which were proofs of piety among the Gentiles, but which would have been defilements to the people of God. The same thing appears more clearly from the passage in Deuteronomy, which next follows, wherein Moses condemns cutting themselves, and making themselves bald for the dead in connection with each other, as if they were one thing; and confirms the law by a general argument, that they might withdraw themselves from every pollution as the children of God; since they were chosen to be His peculiar people; as much as to say, that God's grace would be altogether frustrated, if they did not differ at all from foreign nations. As to his saying that they were chosen out of all the nations, it does not a little illustrate the gratuitous mercy of God, wherewith He honored them alone, by calling them to the hope of eternal salvation, and passing by the Gentiles; for there was no nobility found in them, nor did they exceed others either in number or in any other superiority, on account of which He should prefer them to the whole world. But the design of Moses in magnifying the extraordinary goodness of God, was that they might the more abhor that impure cornmixture, which, by bringing them on a par with the Gentiles, degraded them from this high honor.

Footnotes

1 - "Most of the barbarous nations lately discovered have their faces, arms:, breasts, etc., curiously carved or tattooed, probably for superstitious purposes. Ancient writers abound with accounts of marks made on the faces, arms, etc., in honor of different idols; and to this the inspired penman alludes, (Revelation 13:16-17; 14:9-11, etc.), where false worshippers are represented as receiving in their hands, and in their forehead, the marks of the beast. These were called stigmata among the Greeks, and to these St. Paul refers when he says, "I bear about in my body the marks (stigmata) of the Lord Jesus.".(Galatians 6:17} "All the castes of the Hindoos bear on their foreheads, or elsewhere, what are called sectarian marks, which not only distinguish them in a civil, but in a religious point of view, from each other." "Herodotus observes that the Arabs shave, or cut their hair round, in honor of Bacchus; (lib. 3. ch. 8). He says, also, that the Macians, a people of Lybia, cut their hair round, so as to leave a tuft on the top of the head; (lib. 4. ch. 175." "That the ancients were very violent in their grief, tearing the hair and face, beating the breast, etc., is well known. Virgil represents the sister of Dido: -- Unguibus ora -- foedans, et pectora pugnis. AEn. iv. 672." -- Adam Clarke, in loco.

2 - The authorities for this practice of the Galli, or Priests of Cybele, are too numerous to mention. The following extract from a curious description given by Apuleius, of the religious dance of her worshippers, may suffice: "Die sequenti variis coloribus indusiati, et deformiter quisque formarti, facie coenoso pigmento delita, et oculis obunctis graphice, prodeunt; mitellis, et crocotis, et carbasinis, et bombycinis injecti. Quidam tunicas albas, in modum lanciolarum quoquoversum fluente purpura depictas, cingulo subligati, pedes luteis induti calceis, Deamque serico contectam amiculo mihi gerendam imponunt: brachiisque suis humero tenus renudatis, attollentes immanes gladios ac secures, evantes exsiliunt, incitante tibiae cantu lymphaticum tripudium. "Nec paucis pererratis casulis, ad quandam villam possessoris beati perveniunt, et ab ingressu primo statim absonis ululatibus constrepentes, fanatice pervolant. Diuque capite demisso, cervices lubricis intorquentes motibus, crinesque pendulos rotantes in circulum, et nonnunquam morsibus suos incursantes musculos, ad postremum ancipiti ferro, quod gerebant, sua quisque brachia dissecant." -- Metam. (lib. 8, Edit). (Bipont. 1. 184-185)

Round the corners of your heads - This may allude to such a custom as that of the Arabs described by Herodotus. They used to show honor to their deity Orotal by cutting the hair away from the temples in a circular form. Compare the margin reference.
Mark the corners of thy beard - It has been conjectured that this also relates to a custom which existed among the Arabs, but we are not informed that it had any idolatrous or magical association. As the same, or very similar customs, are mentioned in Leviticus 21:5, and in Deuteronomy 14:1, as well as here, it would appear that they may have been signs of mourning.

Ye shall not round the corners your heads - This and the following verse evidently refer to customs which must have existed among the Egyptians when the Israelites sojourned in Egypt; and what they were it is now difficult, even with any probability, to conjecture. Herodotus observes that the Arabs shave or cut their hair round, in honor of Bacchus, who, they say, had his hair cut in this way, lib. iii., cap. 8. He says also that the Macians, a people of Libya, cut their hair round, so as to leave a tuft on the top of the head, lib. iv., cap. 175. In this manner the Chinese cut their hair to the present day. This might have been in honor of some idol, and therefore forbidden to the Israelites.
The hair was much used in divination among the ancients, and for purposes of religious superstition among the Greeks; and particularly about the time of the giving of this law, as this is supposed to have been the era of the Trojan war. We learn from Homer that it was customary for parents to dedicate the hair of their children to some god; which, when they came to manhood, they cut off and consecrated to the deity. Achilles, at the funeral of Patroclus, cut off his golden locks which his father had dedicated to the river god Sperchius, and threw them into the flood: -
Στας απανευθε πυρης ξονθην απεκειρατο χαιτην,
Την ῥα Σπερχειῳ ποταμῳ τρεφε τηλεθοωσαν·
Οχθησας δ' αρα ειπεν, ιδων επι οινοπα ποντον·
Σπερχει', αλλως σοι γε πατηρ ηρησατο Πηλευς. κ. τ. λ.
Iliad, 1. xxiii., ver. 142, etc.
But great Achilles stands apart in prayer,
And from his head divides the yellow hair,
Those curling locks which from his youth he vowed,
And sacred threw to Sperchius' honored flood.
Then sighing, to the deep his looks he cast,
And rolled his eyes around the watery waste.
Sperchius! whose waves, in mazy errors lost,
Delightful roll along my native coast!
To whom we vainly vowed, at our return,
These locks to fall, and hecatombs to burn
So vowed my father, but he vowed in vain,
No more Achilles sees his native plain;
In that vain hope these hairs no longer grow;
Patrocius bears them to the shades below.
Pope.
From Virgil we learn that the topmost lock of hair was dedicated to the infernal gods; see his account of the death of Dido: -
"Nondum illi flavum Proserpina vertice crinem
Abstulerat, Stygioque caput damnaverat orco
- Hunc ego Diti Sacrum jussa fero; teque isto corpore solvo.
Sic ait, et dextra crinem secat."
Aeneid, lib. iv., ver. 698.
The sisters had not cut the topmost hair,
Which Proserpine and they can only know.
Nor made her sacred to the shades below -
This offering to the infernal gods I bear;
Thus while she spoke, she cut the fatal hair.
Dryden.
If the hair was rounded, and dedicated for purposes of this kind, it will at once account for the prohibition in this verse. The corners of thy beard - Probably meaning the hair of the cheek that connects the hair of the head with the beard. This was no doubt cut in some peculiar manner, for the superstitious purposes mentioned above. Several of our own countrymen wear this said hair in a curious form; for what purposes they know best: we cannot say precisely that it is the ancient Egyptian custom revived. From the images and paintings which remain of the ancient Egyptians, we find that they were accustomed to shave the whole hair off their face, except merely that upon the chin, which last they cut off only in times of mourning.

Ye shall not (k) round the corners of your heads, neither shalt thou mar the corners of thy beard.
(k) As did the Gentiles in sign of mourning.

Ye shall not round the corners of your heads,.... The extremities of the hairs of the head, round about, on the forehead, temples, and behind the ears; this is done, as Jarchi says, when any one makes his temples, behind his ears, and his forehead alike, so that the circumference of his head is found to be round all about, as if they had been cut as with a bowl; and so the Arabians cut their hair, as Herodotus (b) reports; see Gill on Jeremiah 9:26,
neither shall thou mar the corners of thy beard; by shaving them entirely; Jarchi and other Jewish writers say, there are five of them, two on the right, as Gersom reckons them, one on the upper jaw, the other on the nether, and two over against them on the left, and one in the place where the nether jaw joins the right to the left, the chin; the same observes, that it was the manner of idolaters to do the above things; and Maimonides (c) is of opinion that the reason of the prohibition is, because the idolatrous priests used this custom; but this law does not respect priests only, but the people of Israel in general; wherefore rather it was occasioned by the Gentiles in common cutting their hair, in honour of their gods, as the Arabians did, as Herodotus in the above place relates, in imitation of Bacchus, and to the honour of him; and so with others, it was usual for young men to consecrate their hair to idols; but inasmuch as such practices were used on account of the dead, as Aben Ezra observes, it seems probable enough that these things are forbidden to be done on their account, since it follows,
(b) Thalia, sive, l. 3. c. 8. (c) Moreh Nevochim, par. 3. c. 37. Hilchot Obede Cochabim, c. 12. sect. 1.

Ye shall not round the corners of your heads, &c.--It seems probable that this fashion had been learned by the Israelites in Egypt, for the ancient Egyptians had their dark locks cropped short or shaved with great nicety, so that what remained on the crown appeared in the form of a circle surrounding the head, while the beard was dressed into a square form. This kind of coiffure had a highly idolatrous meaning; and it was adopted, with some slight variations, by almost all idolaters in ancient times. (Jeremiah 9:25-26; Jeremiah 25:23, where "in the utmost corners" means having the corners of their hair cut.) Frequently a lock or tuft of hair was left on the hinder part of the head, the rest being cut round in the form of a ring, as the Turks, Chinese, and Hindus do at the present day.
neither shalt thou mar, &c.--The Egyptians used to cut or shave off their whiskers, as may be seen in the coffins of mummies, and the representations of divinities on the monuments. But the Hebrews, in order to separate them from the neighboring nations, or perhaps to put a stop to some existing superstition, were forbidden to imitate this practice. It may appear surprising that Moses should condescend to such minutiÃ&brvbr; as that of regulating the fashion of the hair and the beard--matters which do not usually occupy the attention of a legislator--and which appear widely remote from the province either of government or of a religion. A strong presumption, therefore, arises that he had in mind by these regulations to combat some superstitious practices of the Egyptians.

"Ye shall not round the border of your head:" i.e., not cut the hair in a circle from one temple to the other, as some of the Arab tribes did, according to Herodotus (3, 8), in honour of their god Ὀροτάλ, whom he identifies with the Dionysos of the Greeks. In Jeremiah 9:25; Jeremiah 25:23; Jeremiah 49:32, the persons who did this are called פאה קצוּצי, round-cropped, from their peculiar tonsure. "Neither shalt thou mar the corners of thy beard," sc., by cutting it off (cf. Leviticus 21:5), which Pliny reports some of the Arabs to have done, barba abraditur, praeterquam in superiore labro, aliis et haec intonsa, whereas the modern Arabs either wear a short moustache, or shave off the beard altogether (Niebuhr, Arab. p. 68).

The corners of your heads - That is your temples, ye shall not cut off the hair of your heads round about your temples. This the Gentiles did, either for the worship of their idols, to whom young men used to consecrate their hair, being cut off from their heads, as Homer, Plutarch and many others write; or in funerals or immoderate mournings, as appears from Isaiah 15:2; Jeremiah 48:37. And the like is to be thought concerning the beard or the hair in the corner, that is, corners of the beard. The reason then of this prohibition is because God would not have his people agree with idolaters, neither in their idolatries, nor in their excessive sorrowing, no nor so much as in the appearances of it.