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.
Jewish Publication Society of America Version (JPS1917) - 2 Samuel 21:7 >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.