2 Samuel 21:1

Then there was a famine in the days of David three years, year after year, three successive years, a fact which made the visitation seem a special punishment; and David enquired of the Lord, he sought the face of the Lord, by consulting with the high priest, after earnest prayer. And the Lord answered, It is for Saul and for his bloody house, the house upon which blood-guiltiness rested, because he slew the Gibeonites, he had put to death a number of those people to whom Joshua and the princes of Israel had sworn immunity, Joshua 9:15.