New Living Translation
The king spared Jonathan’s son Mephibosheth, who was Saul’s grandson, because of the oath David and Jonathan had sworn before the LORD.

American Standard Version
But the king spared Mephibosheth, the son of Jonathan the son of Saul, because of Jehovah's oath that was between them, between David and Jonathan the son of Saul.

Berean Study Bible
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.

Douay-Rheims Bible
And the king spared Miphiboseth the son of Jonathan the son of Saul, because of the oath of the Lord, that had been between David and Jonathan the son of Saul.

English Revised 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.

King James Bible
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.

World English Bible
But the king spared Mephibosheth, the son of Jonathan the son of Saul, because of Yahweh's oath that was between them, between David and Jonathan the son of Saul.

Young's Literal Translation
and the king hath pity on Mephibosheth son of Jonathan, son of Saul, because of the oath of Jehovah that is between them, between David and Jonathan son of Saul;

2 Samuel 21:7 Additional Translations ...