Exodus 13:12-14

Living Bible

¹² all firstborn sons and firstborn male animals belong to the Lord, and you shall give them to him. ¹³ A firstborn donkey may be purchased back from the Lord in exchange for a lamb or baby goat; but if you decide not to trade, the donkey shall be killed. However, you must buy back your firstborn sons.

¹⁴ “And in the future, when your children ask you, ‘What is this all about?’ you shall tell them, ‘With mighty miracles Jehovah brought us out of Egypt from our slavery.