Genesis 30:31-34

31Laban asked, ‘What must I give to you?’ Jacob replied, ‘You do not need to give me anything. But just do one thing for me. Then I will still take care of your animals. I will make sure that nothing bad happens to them.

32Do this: Let me go among all your animals today. Let me remove any animal that has a mark on it or that has more than one colour on its skin. I will also take any black lambs. That is what you will give me for my work.

33In the future, this will show that I am honest. You can check on my animals whenever you want to. I will only have sheep or goats that have marks on their skin, or black lambs. If I have any other animals, you may call me a robber.’

34Laban said, ‘I agree to this. It will be as you have said.’