King James Version
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.English Standard Version
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.New International Version
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.