Exodus 13:8-14

8You are to tell your son on that day, ‘It is because of what the Lord did for me when I came out of Egypt.’

9It will be a sign for you on your hand and a memorial on your forehead, so that the law of the Lord may be in your mouth, for with a mighty hand the Lord brought you out of Egypt.

10So you must keep this ordinance at its appointed time from year to year.

11When the Lord brings you into the land of the Canaanites, as he swore to you and to your fathers, and gives it to you,

12then you must give over to the Lord the first offspring of every womb. Every firstling of a beast that you have – the males will be the Lord’s.

13Every firstling of a donkey you must redeem with a lamb, and if you do not redeem it, then you must break its neck. Every firstborn of your sons you must redeem.

14In the future, when your son asks you ‘What is this?’ you are to tell him, ‘With a mighty hand the Lord brought us out from Egypt, from the land of slavery.