Whensoever the stronger cattle did conceive - The word מקשרות mekushsharoth, which we translate stronger, is understood by several of the ancient interpreters as signifying the early, first-born, or early spring cattle; and hence it is opposed to עטפים atuphim, which we translate feeble, and which Symmachus properly renders δευτερογονοι, cattle of the second birth, as he renders the word mekushsharoth by πρωτογονοι, cattle of the first or earliest birth. Now this does not apply merely to two births from the same female in one year, which actually did take place according to the rabbins, the first in Nisan, about our March, and the second in Tisri, about our September; but it more particularly refers to early and late lambs, etc., in the same year; as those that are born just at the termination of winter, and in the very commencement of spring, are every way more valuable than those which were born later in the same spring. Jacob therefore took good heed not to try his experiments with those late produced cattle, because he knew these would produce a degenerate breed, but with the early cattle, which were strong and vigorous, by which his breed must be improved. Hence the whole flock of Laban must be necessarily injured, while Jacob's flock was preserved in a state of increasing perfection. All this proves a consummate knowledge in Jacob of his pastoral office. If extensive breeders in this country were to attend to the same plan, our breed would be improved in a most eminent degree. What a fund of instruction upon almost every subject is to be found in the sacred writings!

And it came to pass, whensoever the stronger cattle did conceive,.... Whose limbs were well compact, and were strong and healthy:

that Jacob laid the rods before the eyes of the cattle in the gutters,

that they might conceive among the rods; and bring forth party coloured ones, and such as were robust and strong like themselves; and this was another device of Jacob's to get the best of the flock. Aben Ezra thinks this refers to the two seasons of the year, when the flocks conceived; the one was in Nisan, in the spring, and such as were brought on that conception were strong, and therefore Jacob chose to lay the rods in the gutters at that time, that he might have the best cattle; and so the Targum of Jonathan calls these here the forward ones, as it does those in Genesis 30:42 we render feeble, the latter ones; which, according to Aben Ezra, conceived in Tisri or September, and what they brought were weak and feeble. (Based on the laws of genetics, Jacob's breeding of the best of the flock would produce higher quality offspring. Ed.)

He did not adopt the trick with the rods, however, on every occasion of copulation, for the sheep in those countries lamb twice a year, but only at the copulation of the strong sheep (המקשּׁרות the bound ones, i.e., firm and compact), - Luther, "the spring flock;" ליחמנּה inf. Pi. "to conceive it (the young);" - but not "in the weakening of the sheep," i.e., when they were weak, and would produce weak lambs. The meaning is probably this: he only adopted this plan at the summer copulation, not the autumn; for, in the opinion of the ancients (Pliny, Columella), lambs that were conceived in the spring and born in the autumn were stronger than those born in the spring (cf. Bochart l.c. p. 582). Jacob did this, possibly, less to spare Laban, than to avoid exciting suspicion, and so leading to the discovery of his trick. - In Genesis 30:43 the account closes with the remark, that the man increased exceedingly, and became rich in cattle (רבּות צאן many head of sheep and goats) and slaves, without expressing approbation of Jacob's conduct, or describing his increasing wealth as a blessing from God. The verdict is contained in what follows.

And it came to pass, whensoever the {m} stronger cattle did conceive, that Jacob laid the rods before the eyes of the cattle in the gutters, that they might conceive among the rods.

(m) As they which took the ram about September and brought forth about March: so the feebler in March and lamb in September.

30:25-43 The fourteen years being gone, Jacob was willing to depart without any provision, except God's promise. But he had in many ways a just claim on Laban's substance, and it was the will of God that he should be provided for from it. He referred his cause to God, rather than agree for stated wages with Laban, whose selfishness was very great. And it would appear that he acted honestly, when none but those of the colours fixed upon should be found among his cattle. Laban selfishly thought that his cattle would produce few different in colour from their own. Jacob's course after this agreement has been considered an instance of his policy and management. But it was done by intimation from God, and as a token of his power. The Lord will one way or another plead the cause of the oppressed, and honour those who simply trust his providence. Neither could Laban complain of Jacob, for he had nothing more than was freely agreed that he should have; nor was he injured, but greatly benefitted by Jacob's services. May all our mercies be received with thanksgiving and prayer, that coming from his bounty, they may lead to his praise.