Leviticus 23:7-11

On the first day you shall have a holy convocation; you shall not do any laborious work.

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.’ ”

Then the Lord spoke to Moses, saying,

“Speak to the sons of Israel and say to them, ‘When you enter the land which I am going to give to you and you gather its harvest, then you shall bring in the sheaf of the first fruits of your harvest to the priest.

He shall wave the sheaf before the Lord for you to be accepted; on the day after the Sabbath the priest shall wave it.