Numbers 31:3

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.

Avenge the Lord of Midian - The war against the Midianites was no ordinary war. It was indeed less a war than the execution of a divine sentence against a most guilty people.

Doubtless there were many among the Midianites who were personally guiltless as regards Israel. But the rulers deliberately adopted the counsel of Balaam against Israel, and their behests had been but too readily obeyed by their subjects. The sin therefore was national, and the retribution could be no less so.

But the commission of the Israelites in the text must not be conceived as a general license to slay. They had no discretion to kill or to spare. They were bidden to exterminate without mercy, and brought back to their task Numbers 31:14 when they showed signs of flinching from it. They had no alternarive in this and similar matters except to fulfill the commands of God; an awful but doubtless salutary manifestation, as was afterward the slaughter of the Canaanites, of God's wrath against sin; and a type of the future extermination of sin and sinners from His kingdom.

31:3 Avenge ye the Lord - For the affront which they offered to God, by their own idolatry and lewdness, and by seducing God's people into rebellion against him. God's great care was to avenge the Israelites, Numbers 31:2 , andMoses's chief desire was to avenge God rather than himself or the people.