2 Samuel 21:5-7

And they said unto the king, The man that consumed us, and that devised against us, that we should be destroyed from remaining in any of the borders of Israel, let seven men of his sons be delivered unto us, and we will hang them up unto Jehovah in Gibeah of Saul, the chosen of Jehovah. And the king said, I will give them. 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.