Issachar. Here mention is partly made of the inheritance, and an indication is partly given of the future condition of this tribe. Although he is called a bony ass on account of his strength, [1] which would enable him to endure labors, especially such as were rustic, yet at the same time his sloth is indicated: for it is added a little afterwards, that he should be of servile disposition. Wherefore the meaning is, that the sons of Issachar, though possessed of strength, were yet quiet rather than courageous, and were as ready to bear the burden of servitude as mules are to submit their backs to the packsaddle and the load. The reason given is, that, being content with their fertile and pleasant country, they do not refuse to pay tribute to their neighbors, provided they may enjoy repose. And although this submissiveness is not publicly mentioned either to their praise or their condemnation, it is yet probable that their indolence is censured, because their want of energy hindered them from remaining in possession of that liberty which had been divinely granted unto them.

Footnotes

1 - Asinus osseus.

Issachar is a strong ass - חמר גרם chamor garem is properly a strong-limbed ass; couching between two burdens - bearing patiently, as most understand it, the fatigues of agriculture, and submitting to exorbitant taxes rather that exert themselves to drive out the old inhabitants.
The two burdens literally mean the two sacks or panniers, one on each side of the animal's body; and couching down between these refers to the well-known propensity of the ass, whenever wearied or overloaded, to lie down even with its burden on its back.

Issachar [is] (l) a strong ass couching down between two burdens:
(l) His force will be great, but he will lack courage to resist his enemies.

Issachar is a strong ass,.... Or as one, the note of similitude being wanting, as Ben Melech observes; "a bony" (e) one, as the word signifies; not one that is lean, and nothing but skin and bones, as some interpret it, but that is strong and robust, able to carry burdens; and this tribe is compared to an ass, not for stupidity and sluggishness, but for its strength, and its use in husbandry, in which this tribe was chiefly occupied: the Targums of Jonathan and Jarchi interpret this figuratively, of his being strong to bear the yoke of the law: and it is a notion of the Jews, that this tribe were skilful in the doctrines of the law, and the intercalation of years, &c. from 1-Chronicles 12:32 couching down between two burdens: one hanging on one side, and another on the other; which Kimchi and Ben Melech interpret of bales of goods; and may as well be understood of sacks of corn, or anything else, carried by these creatures, which, when they come into a good pasture, and for the sake of that and ease, will lie down with their burdens on them, and rise up again with them: the Targums of Onkelos and Jerusalem paraphrase it, "between two borders" (f), or the borders of his brethren, as Jonathan, Zebulun and Daniel, between which this tribe lay; and this is the reason Aben Ezra gives why Issachar, who was older than Zebulun, is mentioned after him, and between him and Daniel, because his land lay between them; and so it may be observed, that in the division of the land in Joshua's time, Issachar's lot came up after Zebulun's, Joshua 19:10 but Doctor Lightfoot thinks (g) it refers to the two kingdoms, between which it lay, that of Phoenicia on one side, and that of Samaria on the other.
(e) "Asinus osseus", Montanus, Tigurine version, Munster, Vatablus, Drusius, Piscator, Cartwright. (f) "inter terminos", V. L. "inter terminos duos", Pagninus, Montanus, Drusius, Cartwright; so Ainsworth, "inter duos finos", Tigurine version. (g) Works, vol. 1. p. 698.

ISSACHAR-- (Genesis 49:14-15)
a strong ass couching down between two burdens--that is, it was to be active, patient, given to agricultural labors. It was established in lower Galilee--a "good land," settling down in the midst of the Canaanites, where, for the sake of quiet, they "bowed their shoulder to bear, and became a servant unto tribute."

"Issachar is a bony ass, lying between the hurdles. He saw that rest was a good (טוב subst.), and the land that it was pleasant; and bowed his shoulder to bear, and became a servant unto tribute." The foundation of this award also lies in the name שׂכר ישּׂא, which is probably interpreted with reference to the character of Issachar, and with an allusion to the relation between שׂכר and שׂכיר, a daily labourer, as an indication of the character and fate of his tribe. "Ease at the cost of liberty will be the characteristic of the tribe of Issachar" (Delitzsch). The simile of a bony, i.e., strongly-built ass, particularly adapted for carrying burdens, pointed to the fact that this tribe would content itself with material good, devote itself to the labour and burden of agriculture, and not strive after political power and rule. The figure also indicated "that Issachar would become a robust, powerful race of men, and receive a pleasant inheritance which would invite to comfortable repose." (According to Joshua. de bell. jud. iii. 3, 2, Lower Galilee, with the fruitful table land of Jezreel, was attractive even to τὸν ἥκιστα γῆς φιλόπονον). Hence, even if the simile of a bony ass contained nothing contemptible, it did not contribute to Issachar's glory. Like an idle beast of burden, he would rather submit to the yoke and be forced to do the work of a slave, than risk his possessions and his peace in the struggle for liberty. To bend the shoulder to the yoke, to come down to carrying burdens and become a mere serf, was unworthy of Israel, the nation of God that was called to rule, however it might befit its foes, especially the Canaanites upon whom the curse of slavery rested (Deuteronomy 20:11; Joshua 16:10; 1-Kings 9:20-21; Isaiah 10:27). This was probably also the reason why Issachar was noticed last among the sons of Leah. In the time of the Judges, however, Issachar acquired renown for heroic bravery in connection with Zebulun (Judges 5:14-15, Judges 5:18). The sons of Leah are followed by the four sons of the two maids, arranged, not according to their mothers or their ages, but according to the blessing pronounced upon them, so that the two warlike tribes stand first.

Issachar is a strong ass, couching down between two burdens - The men of that tribe shall be strong and industrious, fit for and inclined to labour, particularly the toil of husbandry, like the ass that patiently carries his burden. Issachar submitted to two burdens, tillage and tribute.