Leviticus 23:5-11

51In the first month, on the fourteenth day of the month 2at twilight is the Lord’s Passover. 6Then on the fifteenth day of the same month there is the 3Feast 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 4not 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.’”

9Then the Lord spoke to Moses, saying, 10“Speak to the sons of Israel and say to them, ‘When you enter the land which I am going to give to you and 5reap its harvest, then you shall bring in the sheaf of the first fruits of your harvest to the priest. 11He shall wave the sheaf before the Lord for you to be accepted; on the day after the sabbath the priest shall wave it.