If I have done this, i.e. that which Cush and others falsely lay to my charge. If I design or have endeavoured to take away Saul's crown and life by violence, as Saul's courtiers maliciously reported, 1 Samuel 24:9,10 1 Samuel 26:19. In my hands, i.e. in my actions or carriage towards Saul. The hand is oft put for actions, whereof the hand is a great and common instrument, as Psalms 78:42, Psalms 109:27 Jonah 3:8. If I design or have attempted to lay violent hands upon Saul.
Related Commentaries of Psalms 7:3
Psalms 7:3
3 O LORD my God, if I have done this; if there be iniquity in my hands;