Commentaries:
Jamieson, Fausset, and Brown
If ye go to war—In the land of Canaan, either when attacked by foreign invaders or when they went to take possession according to the divine promise, "ye [that is, the priests] shall blow an alarm." This advice was accordingly acted upon (Numbers 31:6; II Chronicles 13:12); and in the circumstances it was an act of devout confidence in God. A solemn and religious act on the eve of a battle has often animated the hearts of those who felt they were engaged in a good and just cause; and so the blowing of the trumpet, being an ordinance of God, produced that effect on the minds of the Israelites. But more is meant by the words—namely, that God would, as it were, be aroused by the trumpet to bless with His presence and aid.
Other Jamieson, Fausset, and Brown entries containing Numbers 10:9:
Numbers 31:6
Deuteronomy 20:2-4
2 Chronicles 13:13-17
Joel 2:1
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