Leviticus 23:6-8

New Catholic Bible

⁶ The fifteenth day of the same month is the Feast of Unleavened Bread to the Lord. You are to eat unleavened bread for seven days. ⁷ On the first day you are to have a holy assembly. No heavy labor is to be done on that day. 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.”