1 Samuel 20:15
and 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."
2 Samuel 21:7
But the king spared Mephibosheth, the son of Saul's son Jonathan, because of the oath of the LORD that was between them, between David and Jonathan the son of Saul.
1 Samuel 24:21
Swear to me therefore by the LORD that you will not cut off my offspring after me, and that you will not destroy my name out of my father's house."
2 Samuel 9:1-7
And David said, "Is there still anyone left of the house of Saul, that I may show him kindness for Jonathan's sake?"