1 Samuel 20:8

Thou hast brought thy servant into a covenant of Jehovah with thee. As the friendship between Jonathan and David had been cemented by the invocation of the name of Jehovah, it was one firm and assured, and David might look not merely for one act of kindness, but for constant truth and help. It was, moreover, Jonathan's own doing; and yet, if there be in me, David says, iniquity , i.e. treason against Saul, if I have not been a faithful and true servant to him, but, on the contrary, have plotted evil against him, or now entertain any evil designs, then let the covenant be abrogated. David refuses to shelter himself under it if he has incurred guilt, and only asks that Jonathan, by the authority which he exercised as the king's son, should himself put him to death, and not deliver him up to Saul