John Gill Commentary Psalms 18:24

"Therefore hath Jehovah recompensed me according to my righteousness, According to the cleanness of my hands in his eyesight." — Psalms 18:24 (ASV)

Therefore has the Lord recompensed me according to my
righteousness
Having proved and supported this proposition by the above reasons, it is repeated, for confirmation's sake;

according to the cleanness of my hands in his eyesight ;
this phrase, "in his eyesight", is here added, to show that the righteousness of Christ was clean, pure, and spotless in the sight of God; in the eye of divine justice: hence those that are clothed with it are holy and unblamable, and irreprovable in his sight, (Colossians 1:22) .