Leviticus 23:26–32

And the Lord spoke to Moses, saying: 27Upon the tenth day of this seventh month shall be the day of atonement. It shall be most solemn, and shall be called holy: and you shall await your souls on that day, and shall offer a holocaust to the Lord. 28You shall do no servile work in the time of this day: because it is a day of propitiation, that the Lord your God may be merciful unto you. 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 shall afflict your souls beginning on the ninth day of the month. From evening until evening you shall celebrate your sabbaths.