Leviticus 23:26-29

26And Jehovah spake unto Moses, saying, 27Howbeit on the tenth day of this seventh month is the day of atonement: it shall be a holy convocation unto you, and ye shall afflict your souls; and ye shall offer an offering made by fire unto Jehovah. 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 Jehovah your God. 29For whatsoever soul it be that shall not be afflicted in that same day; he shall be cut off from his people.