Leviticus 23:25-29

²⁵Ye shall do no manner of servile work; and ye shall bring an offering made by fire unto the LORD.

²⁶And the LORD spoke unto Moses, saying:

²⁷Howbeit on the tenth day of this seventh month is the day of atonement; there shall be a holy convocation unto you, and ye shall afflict your souls; and ye shall bring an offering made by fire unto the LORD.

²⁸And ye shall do no manner of work in that same day; for it is a day of atonement, to make atonement for you before the LORD your God.

²⁹For whatsoever soul it be that shall not be afflicted in that same day, he shall be cut off from his people.