Deuteronomy 16:5-9

LITV(i) 5 You may not sacrifice the Passover offering inside any of your gates, which Jehovah your God gives you. 6 But at the place which He shall choose to cause His name to dwell there, you shall sacrifice the Passover offering at evening, at the going of the sun, at the time when you came out of Egypt. 7 And you shall cook and eat in the place which Jehovah your God shall choose. And in the morning you shall turn and go into your tents. 8 You shall eat unleavened bread six days, and on the seventh day shall be a solemn assembly to Jehovah your God. You shall do no work. 9 You shall number to yourself seven weeks. When the sickle begins to reap in the standing grain, you shall begin to number seven weeks.