Deuteronomy 16:2-6

2Sacrifice to the Lord your God a Passover animal from the herd or flock in the place where the Lord chooses to have his name dwell.

3Do not eat leavened bread with it. For seven days you are to eat unleavened bread with it, the bread of hardship — because you left the land of Egypt in a hurry  — so that you may remember for the rest of your life the day you left the land of Egypt.

4No yeast is to be found anywhere in your territory for seven days, and none of the meat you sacrifice in the evening of the first day is to remain until morning.

5You are not to sacrifice the Passover animal in any of the towns the Lord your God is giving you.

6Sacrifice the Passover animal only at the place where the Lord your God chooses to have his name dwell. Do this in the evening as the sun sets at the same time of day you departed from Egypt.