1 Samuel 18:3

Then Saul spoke with Jonathan his son and all his servants to put David to death. But Jonathan, Saul’s son, greatly delighted in David.

“Therefore show lovingkindness to your servant, for you have brought your servant into a covenant of Yahweh with you. But if there is iniquity in me, put me to death yourself; for why then should you bring me to your father?”

When the young man was gone, David rose from the south side and fell on his face to the ground and bowed three times. And they kissed each other and wept together, but David wept more.

“For all of you have conspired against me so that there is no one who reveals in my ear when my son cuts a covenant with the son of Jesse, and there is none of you who is sorry for me or reveals in my ear that my son has caused my servant to rise up against me to lie in ambush, as it is this day.”

So the two of them cut a covenant before Yahweh; and David stayed at Horesh while Jonathan went to his house.

“I am distressed for you, my brother Jonathan; You have been very pleasant to me. Your love to me was more wonderful Than the love of women.

But the king spared Mephibosheth, the son of Jonathan the son of Saul, because of the oath of Yahweh which was between them, between David and Saul’s son Jonathan.