Deuteronomy 16:4-6

Amplified Bible

⁴ For seven days no leaven shall be seen with you in all your territory, and none of the meat which you sacrificed the evening of the first day shall remain overnight until morning. ⁵ You are not allowed to sacrifice the Passover [lamb] in any of your cities which the Lord your God is giving you; ⁶ but at the place where the Lord your God chooses to establish His Name (Presence), you shall sacrifice the Passover [lamb] in the evening at sunset, at the time that you came out of Egypt.