Leviticus 23:8-10

Amplified Bible

⁸ But you shall present an offering by fire to the Lord for seven days; on the seventh day there shall be a holy convocation; you shall not do any laborious work [on that day].’”

The Feast of First Fruits

⁹ Then the Lord spoke to Moses, saying, ¹⁰ “Speak to the children of Israel and say to them, ‘When you enter the land which I am giving you and reap its harvest, you shall bring the ^[a]sheaf of the first fruits of your harvest to the priest.