Leviticus 23:34-36

34‘Tell Israel's people that the Feast of Huts will start on the 15th day of the seventh month. The feast will continue for seven days, as people worship the Lord.

35The first day is a special day. The people must not do any work.

36For seven days each person must give a gift to the Lord. The eighth day is holy. The people must come together and they must give a burnt offering to the Lord. This is the last day of the feast. The people must not do any work on that day.