Leviticus 23
10 Ref "Speak to the children of Israel, and tell them, 'When you have come into the land which I give to you, and shall reap its the harvest, then you shall bring the sheaf of the first fruits of your harvest to the priest:
11 Ref and he shall wave the sheaf before Yahweh, to be accepted for you. On the next day after the Sabbath the priest shall wave it.