Genesis 31:8

  8  “At one time Laban said, 'You can keep all the goats with spots. This will be your pay.’ After he said this, all the animals gave birth to spotted babies. So they were all mine. But then Laban said, 'I will keep the spotted goats. You can have all the striped goats. That will be your pay.’ After he said this, then all the animals gave birth to striped babies.