1 Samuel 20:9 in the King James Version
And Jonathan said, Far be it from thee: for if I knew certainly that evil were determined by my father to come upon thee, then would not I tell it thee?
Context
8 Therefore deal kindly with your servant, for you have brought your servant into a covenant of the LORD with you; but if there is iniquity in me, kill me yourself, for why should you bring me to your father?”
9 Jonathan said, “Far be it from you; for if I should at all know that evil were determined by my father to come on you, then wouldn’t I tell you that?”
10 Then David said to Jonathan, “Who will tell me if your father answers you roughly?”