Leviticus 23:6-8
6 Then on the fifteenth day of the same month there is the (A)Feast of Unleavened Bread to the Lord; for seven days you shall eat unleavened bread.
7 On the first day you shall have a holy convocation; you shall (B)not do any laborious work.
8 But 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.’”