Leviticus 23:23-27

23The Lord said to Moses,

24“Give the following instructions to the people of Israel. On the first day of the appointed month in early autumn, you are to observe a day of complete rest. It will be an official day for holy assembly, a day commemorated with loud blasts of a trumpet.

25You must do no ordinary work on that day. Instead, you are to present special gifts to the Lord.”

26Then the Lord said to Moses,

27“Be careful to celebrate the Day of Atonement on the tenth day of that same month—nine days after the Festival of Trumpets. You must observe it as an official day for holy assembly, a day to deny yourselves and present special gifts to the Lord.