27But on the tenth day of this seventh month is the day of atonement, a holy convocation shall it be unto you, and ye shall fast; and ye shall offer an offering made by fire unto the Lord.
28And no manner of work shall ye do on this same day; for it is a day of atonement, to make an atonement for you before the Lord your God.
Leviticus 23
Leviticus 23:27-28