Numbers 31:3 - Clarke's commentary and critical notes on the Bible

And Moses spake unto the people, saying, Arm some of yourselves unto the war, and let them go against the Midianites, and avenge the LORD of Midian. Avenge the Lord of Midian - It was God's quarrel, not their own, that they were now to take up. These people were idolaters; idolatry is an offense against God; the civil power has no authority to meddle with what belongs to Him, without especial directions, certified in the most unequivocal way. Private revenge, extension of territory, love of plunder, were to have no place in this business; the Lord is to be avenged; and through Him the children of Israel, (Numbers 31:2), because their souls as well as their bodies had been well nigh ruined by their idolatry.