Leviticus 23:7-9

Amplified Bible

⁷ On the first day you shall have a holy convocation (calling together); you shall not do any laborious work [on that day]. 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,