Leviticus 23:4-8

4‘These are the 1appointed times of the Lord, holy convocations which you shall proclaim at the times appointed for them. 52In the 3first month, on the fourteenth day of the month 4at twilight is the Lord’s Passover. 6Then on the fifteenth day of the same month there is the 5Feast of Unleavened Bread to the Lord; for seven days you shall eat unleavened bread. 7On the first day you shall have a holy convocation; you shall 6not do any laborious work. 8But for seven days you shall present an offering by fire to the Lord. On the seventh day is a holy convocation; you shall not do any laborious work.’”