2 Samuel 21:2

21:2 So the king summoned the Gibeonites and spoke with them. (Now the Gibeonites were not descendants of Israel; they were a remnant of the Amorites. The Israelites had made a promise to them, but Saul tried to kill them because of his zeal for the people of Israel and Judah.)

2 Samuel 21:7

21:7 The king had mercy on Mephibosheth son of Jonathan, the son of Saul, in light of the Lord’s oath that had been taken between David and Jonathan son of Saul.