2 Samuel 1:13-16 - David Orders The Amalekite Killed
13 Meanwhile, David asked the young man who had told him the story, "Where are you from?" He answered, "I'm an Amalekite, the son of a foreign man."
14 At this David asked him, "How is it that you weren't afraid to raise your hand to strike the LORD's anointed?" 15 Then David called out to one of his young men and ordered him, "Go up to him and cut him down!" So he attacked him and killed him. 16 David told him, "Your blood is on your own head, because your own words testified against you! After all, you said, "I myself have killed the LORD's anointed!'"