Deuteronomy 16:3-8

3Thou shalt eat no leavened bread along with it; seven days shalt thou eat unleavened bread with it, 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.

4And there shall be no leaven seen with thee in all thy borders seven days; neither shall any of the flesh, which thou sacrificedst at even on the first day, be left over night until the morning. —

5Thou mayest not sacrifice the passover in one of thy gates, which Jehovah thy 1God giveth thee;

6but at the place that Jehovah thy 2God will choose, to cause his name to dwell in, there thou shalt sacrifice the passover at even, at the going down of the sun, at the time that thou camest forth out of Egypt.

7And thou shalt cook and eat it at the place which Jehovah thy 3God will choose; and in the morning shalt thou turn and go unto thy tents.

8Six days thou shalt eat unleavened bread, and on the seventh day is a solemn assembly to Jehovah thy 4God; thou shalt do no work.