2 Samuel 21
1 Ref In the days of David they were short of food for three years, year after year; and David went before the Lord for directions. And the Lord said, On Saul and on his family there is blood, because he put the Gibeonites to death.
2 Ref Then the king sent for the Gibeonites; (now the Gibeonites were not of the children of Israel, but were the last of the Amorites, to whom the children of Israel had given an oath; but Saul, in his passion for the children of Israel and Judah, had made an attempt on their lives:)