Leviticus 23:33-36

33And the Lord said to Moses,

34“Give the following instructions to the people of Israel. Begin celebrating the Festival of Shelters on the fifteenth day of the appointed month—five days after the Day of Atonement. This festival to the Lord will last for seven days.

35On the first day of the festival you must proclaim an official day for holy assembly, when you do no ordinary work.

36For seven days you must present special gifts to the Lord. The eighth day is another holy day on which you present your special gifts to the Lord. This will be a solemn occasion, and no ordinary work may be done that day.