2 Samuel 21:1-2 Holman Christian Standard Bible (HCSB)
Justice for the Gibeonites
21 During David’s reign there was a famine for three successive years, so David inquired of the Lord. The Lord answered, “It is because of the blood shed by Saul and his family when he killed the Gibeonites.”
2 The Gibeonites were not Israelites but rather a remnant of the Amorites. The Israelites had taken an oath concerning them, but Saul had tried to kill them in his zeal for the Israelites and Judah. So David summoned the Gibeonites and spoke to them.