Leviticus 23:6-8

6Then on the fifteenth day of the same month there is the 1Feast 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 2not 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.’”