Exodus 13:6-8

New Century Version

⁶ For seven days you must eat bread made without yeast, and on the seventh day there will be a feast to honor the Lord. ⁷ So for seven days you must not eat any bread made with yeast. There must be no bread made with yeast anywhere in your land. ⁸ On that day you should tell your son: ‘We are having this feast because of what the Lord did for me when I came out of Egypt.’