1 Samuel 20:11-15
English Standard Version
12And Jonathan said to David, "The Lord, the God of Israel, be witness! When I have sounded out my father, about this time tomorrow, or the third day, behold, if he is well disposed toward David, shall I not then send and disclose it to you?
13But should it please my father to do you harm, the Lord do so to Jonathan and more also if I do not disclose it to you and send you away, that you may go in safety. May the Lord be with you, as he has been with my father.
14If I am still alive, show me the steadfast love of the Lord, that I may not die;
15and do not cut off your steadfast love from my house forever, when the Lord cuts off every one of the enemies of David from the face of the earth."