Deuteronomy 16:4-6

Modern English Version

⁴ There must not be any leavened bread seen with you within all your borders for seven days, nor may any of the meat which you sacrificed in the evening on the first day remain overnight until morning.

⁵ You may not sacrifice the Passover within any of your gates that the Lord your God has given you. ⁶ But at the place where the Lord your God chooses to place His name, there you shall sacrifice the Passover in the evening at sunset, at the time that you came out of Egypt.