Leviticus 23:24-25 Lev. 23:24-25
24 Speak unto 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, an holy convocation. 25 Ye shall do no servile work therein: but ye shall offer an offering made by fire unto the LORD.
Psalm 81:3-4 Ps. 81:3-4
3 Blow up the trumpet in the new moon, in the time appointed, on our solemn feast day. 4 For this was a statute for Israel, and a law of the God of Jacob.
(Relation)