Genesis 30:40

40 Jacob separated the young animals from the others, and he made them face the streaked and dark animals in Laban's flock. Jacob kept his animals separate from Laban's.

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 He put the branches in front of the flocks at the watering places. When the animals came to drink, they also mated there,

39 so the flocks mated in front of the branches. Then the young that were born were streaked, speckled, or spotted.

40 Jacob separated the young animals from the others, and he made them face the streaked and dark animals in Laban's flock. Jacob kept his animals separate from Laban's.

41 When the stronger animals in the flock were mating, Jacob put the branches before their eyes so they would mate near the branches.

42 But when the weaker animals mated, Jacob did not put the branches there. So the animals born from the weaker animals were Laban's, and those born from the stronger animals were Jacob's.