Psalm 58:10
9 Before the kindling is even placed under your pots, he will sweep it away along with both the raw and cooked meat. 10 The godly will rejoice when they see vengeance carried out; they will bathe their feet in the blood of the wicked. 11 Then observers will say, “Yes indeed, the godly are rewarded. Yes indeed, there is a God who judges in the earth.”
Isaiah 63:2
2 Why are your clothes red? Why do you look like someone who has stomped on grapes in a vat? 3 “I have stomped grapes in the wine press all by myself; no one from the nations joined me. I stomped on them in my anger; I trampled them down in my rage. Their juice splashed on my garments and stained all my clothes. 4 For I looked forward to the day of vengeance, and then payback time arrived. 5 I looked, but there was no one to help; I was shocked because there was no one offering support. So my right arm accomplished deliverance; my raging anger drove me on. 6 I trampled nations in my anger; I made them drunk in my rage; I splashed their blood on the ground.”
Notes and References
"... Here the godly join in the victory march, as they too have been granted victory. The imagery of feet in blood portrays the victory (compare Isaiah 63:1-6; Revelation 14:19-20; 19:13-14), rather than the gruesome picture of people relishing the death of the wicked. The godly share together with the Lord in his triumph over evil. Hence it is better to understand the word “avenged” as “victorious”: “The just will rejoice when they behold [ḥāzâ] his victory.” ..."
VanGemeren, Willem A. The Expositor’s Bible Commentary: Psalms (p. 627) Zondervan, 2008