The righteous shall rejoice— Not from a mere complacence in the destruction of his enemies, but from a zeal for the glory of God, which is thereby displayed. He shall wash his feet, &c. is an allusion to a great conqueror, who, upon returning with a complete victory from the slaughter of his enemies, dips his feet in their blood as he passes over their carcases.
Related Commentaries of Psalms 58:10
Psalms 58:10
10 The righteous shall rejoice when he seeth the vengeance: he shall wash his feet in the blood of the wicked.