Leviticus 23:29-39

²⁹Every soul that is not afflicted on this day, shall perish from among his people:

³⁰And every soul that shall do any work, the same will I destroy from among his people.

³¹You shall do no work therefore on that day: it shall be an everlasting ordinance unto you in all your generations, and dwellings.

³²It is a sabbath of rest, and you shell afflict your souls beginning on the ninth day of the month: from evening until evening you shall celebrate your sabbaths.

³³And the Lord spoke to Moses, saying:

³⁴Say to the children of Israel: From the fifteenth day of this same seventh month, shall be kept the feast of tabernacles seven days to the Lord.

³⁵The first day shall be called most solemn and most holy: you shall do no servile work therein. And seven days you shall offer holocausts to the Lord.

³⁶The eighth day also shall be most solemn and most holy, and you shall offer holocausts to the Lord: for it is the day of assembly and congregation: you shall do no servile work therein.

³⁷These are the feasts of the Lord, which you shall call most solemn and most holy, and shall offer on them oblations to the Lord, holocausts and libations according to the rite of every day,

³⁸Besides the sabbaths of the Lord, and your gifts, and those things that you offer by vow, or which you shall give to the Lord voluntarily.

³⁹So from the fifteenth day of the seventh month, when you shall have gathered in all the fruits of your land, you shall celebrate the feast of the Lord seven days: on the first day and the eighth shall be a sabbath, that is a day of rest.