Deuteronomy 16:3

Overview - Deuteronomy 16
1	The feast of the passover,
9	of weeks,
13	of tabernacles.
16	Every male must offer, as he is able, at these three feasts.
18	Of judges and justice.
21	Groves and images are forbidden.

Deuteronomy 16:3  (King James Version)
Thou shalt eat no leavened bread with it; seven days shalt thou eat unleavened bread therewith, even the bread of affliction; for thou camest forth out of the land of Egypt in haste: that thou mayest remember the day when thou camest forth out of the land of Egypt all the days of thy life.