Numbers 31:3

To carry out this revenge, Moses had 1000 men of each tribe delivered (ימּסרוּ, see at Num 31:16) from the families (alaphim, see Num 1:16) of the tribes, and equipped for war; and these he sent to the army (into the war) along with Phinehas the son of Eleazar the high priest, who carried the holy vessels, viz., the alarm-trumpets, in his hand. Phinehas was attached to the army, not as the leader of the soldiers, but as the high priest with the holy trumpets (Num 10:9), because the war was a holy war of the congregation against the enemies of themselves and their God. Phinehas had so distinguished himself by the zeal which he had displayed against the idolaters (Num 25:7), that it was impossible to find any other man in all the priesthood to attach to the army, who would equal him in holy zeal, or be equally qualified to inspire the army with zeal for the holy conflict. "The holy vessels" cannot mean the ark of the covenant on account of the plural, which would be inapplicable to it; nor the Urim and Thummim, because Phinehas was not yet high priest, and the expression כּלי would also be unsuitable to these. The allusion can only be to the trumpets mentioned immediately afterwards, the ו before חצצרות being the ו explic., "and in fact." Phinehas took these in his hand, because the Lord had assigned them to His congregation, to bring them into remembrance before Him in time of war, and to ensure His aid (Num 10:9).

In this chapter we have, I. The humble request of the tribes of Reuben and Gad for an inheritance on that side Jordan where Israel now lay encamped (Num 32:1-5). II. Moses's misinterpretation of their request (Num 32:6-15). III. Their explication of it, and stating it aright (Num 32:16-19). IV. The grant of their petition under the provisos and limitations which they themselves proposed (Num 32:20, etc.).

31:3-5 Each tribe contributed 1,000 men for the battle, which enabled all of them to gain experience in combat and share in the victory.