Psalms 69:4, “They that hate me without a cause are more than the hairs of mine head: they that would destroy me, being mine enemies wrongfully, are mighty: then I restored that which I took not away.”
David was being accused of sins that he did not commit. His enemies were requiring justice. David felt he must repay even though he did no wrong.
Paul also became everything to everyone. 1 Corinthians 9:22, “To the weak became I as weak, that I might gain the weak: I am made all things to all men, that I might by all means save some.”
Christ paid The debt of sin his enemies required with his own blood. The Spirit of God in David and Paul did the same as Christ did. Christ paid the debt of sin even though it was our sin and won our salvation.