Genesis 30:40

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.

Genesis 30:40 Meaning and Commentary

Genesis 30:40

And Jacob did separate the lambs
The ringstraked, speckled, and spotted; and set the faces of the flocks,
that were all white, towards the ringstraked, and all the brown in the flock of Laban;
either to go before those that were all white, that they by looking at them might conceive and bring forth such, which was another artifice of Jacob's to increase his own sheep; or else he set at the water troughs the white sheep on one side of them, and on the opposite side the speckled ones that the same effect might also be produced the more successfully both by the rods and by the speckled lambs: and he put his own flocks by themselves, and put them not unto Laban's
cattle;
partly that they might not be mixed together, but kept distinct, that what was his property might be discerned from Laban's; and partly, lest his spotted ones, being mixed with Laban's white sheep, by continual looking at them, should conceive and bring forth such likewise, and so his flocks be lessened.

Genesis 30:40 In-Context

38 Then he set the rods he had peeled upright in the watering troughs, so that the animals would see them when they came to drink. And since they bred when they came to drink,

39 the animals mated in sight of the rods and gave birth to streaked, speckled and spotted young.

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.