Leviticus 23:10-11

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 reap 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.