Deuteronomy 16:5-7

Thou mayest not sacrifice the passover within any of thy gates, which the LORD thy God giveth thee: but at the place which the LORD thy God shall choose to place his name in, there thou shalt sacrifice the passover at even, at the going down of the sun, at the season that thou camest forth out of Egypt. And thou shalt roast and eat it in the place which the LORD thy God shall choose: and thou shalt turn in the morning, and go unto thy tents.