Deuteronomy 16:6-8

6but only 1at the place where the Lord your God chooses to establish His name, you shall sacrifice the Passover in the evening at sunset, at the time that you came out of Egypt. 7You shall 2cook and eat it in the place which the Lord your God chooses. In the morning you are to return to your tents. 8For six days you shall eat unleavened bread, and 3on the seventh day there shall be 4a festive assembly to the Lord your God; you shall do no work on it.