Leviticus 23:33-36

GOD said to Moses: “Tell the People of Israel, GOD’s Feast of Booths begins on the fifteenth day of the seventh month. It lasts seven days. The first day is a sacred assembly; don’t do any ordinary work. Offer Fire-Gifts to GOD for seven days. On the eighth day hold a sacred assembly and offer a gift to GOD. It is a solemn convocation. Don’t do any ordinary work.