Then Jonathan made a covenant with David because he loved him as himself.
"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, put me to death yourself; for why then should you bring me to your father?"
Jonathan said to David, "Go in safety, inasmuch as we have sworn to each other in the name of the LORD, saying, 'The LORD will be between me and you, and between my descendants and your descendants forever.'" Then he rose and departed, while Jonathan went into the city.
So the two of them made a covenant before the LORD; and David stayed at Horesh while Jonathan went to his house.
Then David said, "Is there yet anyone left of the house of Saul, that I may show him kindness for Jonathan's sake?"
But the king spared Mephibosheth, the son of Jonathan the son of Saul, because of the oath of the LORD which was between them, between David and Saul's son Jonathan.