Leviticus 23:23-27

23And Jehovah spoke to Moses, saying,

24Speak unto the children of Israel, saying, In the seventh month, on the first of the month, shall ye have a rest, a memorial of blowing of trumpets, a holy convocation.

25No manner of servile work shall ye do; and ye shall present an offering by fire to Jehovah.

26And Jehovah spoke to Moses, saying,

27Also on the tenth of this seventh month is the day of the atonement: a holy convocation shall it be unto you; and ye shall afflict your souls, and present an offering by fire to Jehovah.