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; seven days you shall eat with it unleavened bread, the bread of affliction (for you came out of the land of Egypt in haste), so that you may remember 5all the days of your life the day when you came out of the land of Egypt.

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

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