Leviticus 23:23-25 - The Feast Of Trumpets
23 And the LORD spoke to Moses, saying, 24 Speak to the children of Israel, saying, In the seventh month, in the first day of the month, shall ye have a sabbath, a memorial of blowing of trumpets, a holy convocation. 25 Ye shall do no servile work in it; but ye shall offer an offering made by fire to the LORD.