Deuteronomy 16:1-5

1“Observe 1the month of Abib and 23celebrate the Passover to the Lord your God, for in the month of Abib the Lord your God brought you out of Egypt by night.

2You shall sacrifice the Passover to the Lord your God from the flock and the herd, in the place where the Lord chooses to establish His name.

34You shall not eat leavened bread with it; for seven days you shall eat unleavened bread with it, the bread of affliction (for you came out of the land of Egypt in a hurry), so that you will remember the day when you came out of the land of Egypt 5all the days of your life.

4For seven days no leaven shall be seen with you in your entire territory, and 6none of the meat which you sacrifice on the evening of the first day shall be left overnight until the morning.

5You are not allowed to sacrifice the Passover in any of your 7towns which the Lord your God is giving you;