Genesis 30:42

42 but he didn't set up the rods in front of the weaker animals. Thus the more feeble were Lavan's and the stronger Ya'akov's.

Genesis 30:42 Meaning and Commentary

Genesis 30:42

And when the cattle were feeble, he put them not in
Or "when covered", as Menachem, that is, with wool, and so not so desirous of copulation with the males, nor so fit and strong for generation; and therefore he put not in the rods into the gutters, partly that he might have none feeble in his flock, and partly that he might not spoil Laban of his whole flock, strong and weak: so the feebler were Laban's, and the stronger Jacob's;
not only his flocks became more numerous than Laban's, but were a better quality.

Genesis 30:42 In-Context

40 Ya'akov divided the lambs and had the animals mate with the streaked and the brown in the flock of Lavan. He also kept his own livestock separate and did not have them mix with Lavan's flock.

41 Whenever the hardier animals came into heat, Ya'akov would set up the rods in the watering troughs; so that the animals would see them and conceive in front of them;

42 but he didn't set up the rods in front of the weaker animals. Thus the more feeble were Lavan's and the stronger Ya'akov's.

43 In this way the man became very rich and had large flocks, along with male and female slaves, camels and donkeys.