And he said unto him, God forbid; thou shalt not die: behold, my father will do nothing either great or small, but that he will shew it me: and why should my father hide this thing from me? it is not so. My father will do nothing - Jonathan thought that his father could have no evil design against David, because of the oath which he had sworn to himself 1 Samuel 19:6; and at any rate, that he would do nothing against David without informing him.
Related Commentaries of 1 Samuel 20:2
1 Samuel 20:2
2 And he said unto him, God forbid; thou shalt not die: behold, my father will do nothing either great or small, but that he will shewa it me: and why should my father hide this thing from me? it is not so.