II Samuel 21:1-7

Now there was a famine in the days of David for three years, year after year; and David inquired of the LORD. And the LORD answered, “It is because of Saul and his bloodthirsty house, because he killed the Gibeonites.” So the king called the Gibeonites and spoke to them. Now the Gibeonites were not of the children of Israel, but of the remnant of the Amorites; the children of Israel had sworn protection to them, but Saul had sought to kill them in his zeal for the children of Israel and Judah. Therefore David said to the Gibeonites, “What shall I do for you? And with what shall I make atonement, that you may bless the inheritance of the LORD?” And the Gibeonites said to him, “We will have no silver or gold from Saul or from his house, nor shall you kill any man in Israel for us.” So he said, “Whatever you say, I will do for you.” Then they answered the king, “As for the man who consumed us and plotted against us, that we should be destroyed from remaining in any of the territories of Israel, let seven men of his descendants be delivered to us, and we will hang them before the LORD in Gibeah of Saul, whom the LORD chose.” And the king said, “I will give them.” 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.