Deuteronomy 16:4-6

New American Bible (Revised Edition)

⁴ No leaven is to be found with you in all your territory for seven days, and none of the meat which you sacrificed on the evening of the first day shall be kept overnight for the next day.

⁵ You may not sacrifice the Passover in any of the communities which the Lord, your God, gives you; ⁶ only at the place which the Lord, your God, will choose as the dwelling place of his name, and in the evening at sunset, at the very time when you left Egypt, shall you sacrifice the Passover.^(A)