2 Samuel 21:1-2

David Avenges the Gibeonites

1 Now there was a famine in the days of David for three years, year after year. And David a sought the face of the  Lord. And the  Lord said, “There is bloodguilt on Saul and on his house, because he put the Gibeonites to death.” 2 So the king called the Gibeonites and spoke to them. Now the Gibeonites were not of the people of Israel but b of the remnant of the Amorites. Although the people of Israel had sworn to spare them, Saul had sought to strike them down in his zeal for the people of Israel and Judah.
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