Exodus 13:7-9

New Revised Standard Version, Anglicised

⁷ Unleavened bread shall be eaten for seven days; no leavened bread shall be seen in your possession, and no leaven shall be seen among you in all your territory. ⁸ You shall tell your child on that day, “It is because of what the Lord did for me when I came out of Egypt.” ⁹ It shall serve for you as a sign on your hand and as a reminder on your forehead, so that the teaching of the Lord may be on your lips; for with a strong hand the Lord brought you out of Egypt.