Numbers 10:10

10 Also on your days of rejoicing, at your appointed festivals, and at the beginnings of your months, you shall blow the trumpets over your burnt offerings and over your sacrifices of well-being; they shall serve as a reminder on your behalf before the Lord your God: I am the Lord your God.

Numbers 10:10 In-Context

8 The sons of Aaron, the priests, shall blow the trumpets; this shall be a perpetual institution for you throughout your generations.
9 When you go to war in your land against the adversary who oppresses you, you shall sound an alarm with the trumpets, so that you may be remembered before the Lord your God and be saved from your enemies.
10 Also on your days of rejoicing, at your appointed festivals, and at the beginnings of your months, you shall blow the trumpets over your burnt offerings and over your sacrifices of well-being; they shall serve as a reminder on your behalf before the Lord your God: I am the Lord your God.
11 In the second year, in the second month, on the twentieth day of the month, the cloud lifted from over the tabernacle of the covenant.
12 Then the Israelites set out by stages from the wilderness of Sinai, and the cloud settled down in the wilderness of Paran.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.