But the king spared Mephibosheth, the son of Jonathan the son of Saul, because of the LORD’s oath that [was] between them, between David and Jonathan the son of Saul.
Berean Study Bible (BSB) - 2 Samuel 21:7 >Now the king spared Mephibosheth son of Jonathan, the son of Saul, because of the oath before the LORD between David and Jonathan son of Saul.