Numbers 10:9-12

⁹And when you enter upon the battle fight for your country, with the oppressors who oppress you, ye shall blow the alarm with the trumpets, that your remembrance may come for good before the Lord your God, (and) that you may be delivered from them who hate you.

¹⁰And on the day of your rejoicing, and on your solemnities, and at the beginning of your months, ye shall blow with the trumpets over your burnt offerings, and over your consecrated victims; and they shall be for a memorial before your God: I am the Lord your God.

¹¹And it was in the second year, in the second month, on the twentieth day of the month, that the Cloud was uplifted from above the Tabernacle of the Testimony,

¹²And the children of Israel went forward upon their journeys from the wilderness of Sinai; and the Cloud rested in the wilderness of Pharan.