Deuteronomy 16:2-4

New Catholic Bible

² Make a Passover sacrifice from your flock or your herd to the Lord, your God, in the place where the Lord has chosen to place his name. ³ Do not eat leavened bread, but eat unleavened bread for seven days. This is the bread of affliction, for you had to leave the land of Egypt in haste. Thus, all of your life you will remember the day that you came forth from Egypt. ⁴ There should be no leavened bread in your entire land for seven days. Do not let any of the meat of the sacrifice that was made on the first evening remain until the next morning.