Deliver me, O my God, out of the hand of the wicked, out of the hand of the unrighteous and cruel man. Out of the hand of the wicked - Probably his unnatural son Absalom, called here רשע rasha, the Wicked, because he had violated all laws, human and Divine.
The unrighteous and cruel man - Probably Ahithophel who was the iniquitous counsellor of a wicked and rebellious son.