Genesis 47:24-26 Contemporary English Version (CEV)
24 but one-fifth of your crops must go to the king. You can keep the rest as seed or as food for your families.”
25 “Sir, you have saved our lives!” they answered. “We are glad to be slaves of the king.” 26 Then Joseph made a law that one-fifth of the harvest would always belong to the king. Only the priests did not lose their land.