Leviticus 23:8-10

New Catholic Bible

⁸ You will make an offering by fire to the Lord for seven days. On the seventh day you are to have a holy assembly. No heavy labor is to be done on that day.”

^9 [a]The Lord spoke to Moses, saying, ¹⁰ “Speak to the children of Israel and say to them: When you enter the land that I am giving you, and you collect the harvest, you are to bring an omer measure of the firstfruits of your harvest to the priest.