Deuteronomy 16:4-6

New Catholic Bible

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. ^5 [a]You are not to make the Passover sacrifice in any of the towns that the Lord, your God, has given you. ⁶ Do it only in the place that the Lord, your God, has chosen to place his name. You will make the Passover sacrifice in the evening, when the sun goes down, at the time when you went forth out of Egypt.