Leviticus 23:23-25 - The Feast Of Trumpets
23 And Jehovah spake unto Moses, saying, 24 Speak unto the children of Israel, saying, In the seventh month, on the first day of the month, shall be a solemn rest unto you, a memorial of blowing of trumpets, a holy convocation. 25 Ye shall do no servile work; and ye shall offer an offering made by fire unto Jehovah.