Leviticus 23:33-38

³³And the Lord spake to Moses, and said,

³⁴Speak thou to the sons of Israel, From the fifteenth day of this seventh month shall be the fairs of tabernacles, in seven days to the Lord;

³⁵the first day shall be called most solemn and most holy, ye shall not do any servile work therein;

³⁶and seven days ye shall offer burnt sacrifices to the Lord, and the eighth day shall be most solemn and most holy; and ye shall offer burnt sacrifice to the Lord, for it is the day of company, and of gathering; ye shall not do any servile work therein.

³⁷These be the fairs of the Lord, which ye shall call most solemn and most holy; and in them ye shall offer offerings to the Lord, burnt sacrifices, and flowing offerings, by the custom of each day,

³⁸besides the sabbaths of the Lord, and your gifts, and that that ye offer by avows, either that that ye give by free will to the Lord.