Genesis 30:35

32 Let me go through all your flock today, taking out from among them all the sheep which are marked or coloured or black, and all the marked or coloured goats: these will be my payment.

33 And so you will be able to put my honour to the test in time to come; if you see among my flocks any goats which are not marked or coloured, or any sheep which is not black, you may take me for a thief.

34 And Laban said, Let it be as you say.

35 So that day he took all the he-goats which were banded or coloured, and all the she-goats which were marked or coloured or had white marks, and all the black sheep, and gave them into the care of his sons;

36 And sent them three days' journey away: and Jacob took care of the rest of Laban's flock.

37 Then Jacob took young branches of trees, cutting off the skin so that the white wood was seen in bands.

38 And he put the banded sticks in the drinking-places where the flock came to get water; and they became with young when they came to the water.