Deuteronomy 16:4-6

Evangelical Heritage Version

⁴ No yeast or leaven is to be found among you for seven days, and none of the meat that you sacrifice on the evening of the first day is to be left until morning.

⁵ You are not allowed to sacrifice the Passover inside the gates of any of the cities that the Lord your God is giving you. ⁶ Rather, it is at the place where the Lord your God will choose to establish his name that you are to sacrifice the Passover, in the evening at the setting of the sun, the time of day that you went out of Egypt.