Genesis 31:8

If he said thus, The speckled shall be thy wages; then all the cattle bare speckled: and if he said thus, The ringstraked shall be thy hire; then bare all the cattle ringstraked.

Laban repeatedly changed the wages he had agreed to pay Jacob. At one time he named the speckled cattle as Jacob's wages, and at another time he named the ringstraked cattle as his hire. Whenever either kind was specified, all the cattle then bore young of that specified kind, whether speckled or ringstraked. In this way Jacob's livestock increased despite Laban's shifting terms.