Of turtledoves, or of young pigeons - The offering of a bird was permitted to one who was too poor to offer a quadruped. (Compare the marginal references.) But in certain rites of purification birds were appointed for all, whatever might be their circumstances. See Leviticus 15:14, Leviticus 15:29; Numbers 6:10. The limitation of the age of the pigeons may be accounted for by the natural habits of the birds. It would seem that the species which are most likely to have been the sacrificial dove and pigeon are the common turtle and the bluerock pigeon, a bird like our stock-dove, and considerably larger than the turtle. The turtles come in the early part of April, but as the season advances they wholly disappear. The pigeons, on the contrary, do not leave the country; and their nests, with young ones in them, may be easily found at any season of the year. Hence, it would appear, that when turtledoves could not be obtained, nestling pigeons were accepted as a substitute.

And if the burnt sacrifice for his offering to the Lord be of fowls,.... As it might be for the poorer sort, who could not offer a bullock, nor a sheep, or a lamb, Leviticus 5:7,
then he shall bring his offering of turtledoves, or of young pigeons; the Jewish writers all agree, that the turtles should be old, and not young, as the pigeons young, and not old; so the Targum of Jonathan, Jarchi, Aben Ezra and Gersom (l); the latter gives two reasons for it, because then they are the choicest and easiest to be found and taken: no mention is made of their being male or female, either would do, or of their being perfect and unblemished, as in the other burnt offerings; but if any part was wanting, it was not fit for sacrifice, as Maimonides (m) observes. These creatures were proper emblems of Christ, and therefore used in sacrifice, whose voice is compared to the turtle's, and his eyes to the eyes of doves, Song 2:12 and who is fitly represented by them for his meekness and humility, for his chaste and strong affection to his church, as the turtledove to its mate, and for those dove like graces of the Spirit which are in him.
(l) Vid. T. Bab. Cholin, fol. 22. 1, 2. (m) Issure Mizbeach, c. 3. sect. 1, 2. Vid. Misn. Zebachim, c. 7. sect. 5. & Maimon. & Bartenora, in ib.

if the burnt sacrifice . . . be of fowls--The gentle nature and cleanly habits of the dove led to its selection, while all other fowls were rejected, either for the fierceness of their disposition or the grossness of their taste; and in this case, there being from the smallness of the animal no blood for waste, the priest was directed to prepare it at the altar and sprinkle the blood. This was the offering appointed for the poor. The fowls were always offered in pairs, and the reason why Moses ordered two turtledoves or two young pigeons, was not merely to suit the convenience of the offerer, but according as the latter was in season; for pigeons are sometimes quite hard and unfit for eating, at which time turtledoves are very good in Egypt and Palestine. The turtledoves are not restricted to any age because they are always good when they appear in those countries, being birds of passage; but the age of the pigeons is particularly marked that they might not be offered to God at times when they are rejected by men [HARMER]. It is obvious, from the varying scale of these voluntary sacrifices, that the disposition of the offerer was the thing looked to--not the costliness of his offering.

The burnt-offering of fowls was to consist of turtle-doves or young pigeons. The Israelites have reared pigeons and kept dovecots from time immemorial (Isaiah 60:8, cf. 2-Kings 6:25); and the rearing of pigeons continued to be a favourite pursuit with the later Jews (Josephus, de bell. jud. v. 4, 4), so that they might very well be reckoned among the domesticated animals. There are also turtle-doves and wild pigeons in Palestine in such abundance, that they could easily furnish the ordinary animal food of the poorer classes, and serve as sacrifices in the place of the larger animals. The directions for sacrificing these, were that the priest was to bring the bird to the altar, to hip off its head, and cause it to ascend in smoke upon the altar. מלק, which only occurs in Leviticus 1:15 and Leviticus 5:8, signifies undoubtedly to pinch off, and not merely to pinch; for otherwise the words in Leviticus 5:8, "and shall not divide it asunder," would be superfluous. We have therefore to think of it as a severance of the head, as the lxx (ἀποκνίζειν) and Rabbins have done, and not merely a wringing of the neck and incision in the skin by which the head was left hanging to the body; partly because the words, "and not divide it asunder," are wanting here, and partly also because of the words, "and burn it upon the altar," which immediately follow, and which must refer to the head, and can only mean that, after the head had been pinched off, it was to be put at once into the burning altar-fire. For it is obviously unnatural to regard these words as anticipatory, and refer them to the burning of the whole dove; not only from the construction itself, but still more on account of the clause which follows: "and the blood thereof shall be pressed out against the wall of the altar." The small quantity that there was of the blood prevented it from being caught in a vessel, and swung from it against the altar.

Turtle - doves - These birds were appointed for the poor who could not bring better. And these birds are preferred before others, partly because they were easily gotten, and partly because they are fit representations of Christ's chastity, and meekness, and gentleness, for which these birds are remarkable. The pigeons must be young, because then they are best; but the turtle - doves are better when they are grown up, and therefore they are not confined to that age.