Charles H. Spurgeon on Psalms 58:10

. When angels execute God's judgments upon sinners, the saints see much in it; they see matter of fear and praise; of fear, in that God's power, wrath, and hatred are manifested in them against sin and sinners; of praise, in that themselves are delivered and justice performed. When the wicked are taken away by a divine stroke, by the hand of justice, and God hath the glory of his justice, the righteous rejoice at it: but is that all? No, he washes his feet in the blood of the wicked; that is, by this judgment he fears and reforms. It is a metaphor taken from the practice of those parts where they went barefoot, or with sandals, and so contracted much filth, and used to wash and cleanse their feet when they came in; so here, the godly seeing the hand of God upon the wicked, fears, and judges himself for his sins, purges his conscience and affections, and stands now in awe of that God who hath stricken the wicked for those sins which he himself in part is guilty of. Waldus, a man of note in Lyons, seeing one struck dead in his presence, he washed his hands in his blood; for presently he gave alms to the poor, instructed his family in the true knowledge of God, and exhorted all that came unto him to repentance and holiness of life. William Greenhill, 1691-1777.