Charles Ellicott Commentary Psalms 94:1

"O Jehovah, thou God to whom vengeance belongeth, Thou God to whom vengeance belongeth, shine forth." — Psalms 94:1 (ASV)

The original is far more striking in its conciseness. God of retributions, Jehovah, God of retributions shine forth. The emphatic repetition of a phrase is a feature of this psalm. (Psalms 94:23.)