Deuteronomy 16:6-8

6but at the place that Jehovah thy 1God will choose, to cause his name to dwell in, there thou shalt sacrifice the passover at even, at the going down of the sun, at the time that thou camest forth out of Egypt.

7And thou shalt cook and eat it at the place which Jehovah thy 2God will choose; and in the morning shalt thou turn and go unto thy tents.

8Six days thou shalt eat unleavened bread, and on the seventh day is a solemn assembly to Jehovah thy 3God; thou shalt do no work.