Exodus 13:8 BBE

⁶  For seven days let your food be unleavened cakes; and on the seventh day there is to be a feast to the Lord.

⁷  Unleavened cakes are to be your food through all the seven days; let no leavened bread be seen among you, or any leaven, in any part of your land.

⁸  And you will say to your son in that day, It is because of what the Lord did for me when I came out of Egypt.

⁹  And this will be for a sign to you on your hand and for a mark on your brow, so that the law of the Lord may be in your mouth: for with a strong hand the Lord took you out of Egypt.

¹⁰  So let this order be kept, at the right time, from year to year.