1 Samuel 20:11-17

Jonathan said to David, “Come, let’s go out to the field.” So they both went out to the field. Then Jonathan said to David, “By ADONAI, God of Israel, I will sound out my father about this time tomorrow or the day after. Look, if it is good toward David, wouldn’t I then send word to you and disclose it to you? May ADONAI do so to Jonathan and even worse, should my father intend to do you evil, if I don’t disclose it to you and send you away, that you may go in shalom. So may ADONAI be with you as He has been with my father. “Now if I am still alive, wouldn’t you show me the loyal love of ADONAI so I wouldn’t die? Yet also, don’t cut off your loyal love from my household ever—not even when ADONAI cuts off all of David’s enemies from the face of the earth.” So Jonathan cut a covenant with the house of David, “So may ADONAI requite David’s enemies.” Jonathan made David swear again because of the love he had for him, for he loved him as he loved himself.