2 Samuel 1:8-16

ISV(i) 8 He asked me, ‘Who are you?’ So I answered him, ‘I’m an Amalekite!’ 9 He begged me, ‘Please—come stand here next to me and kill me, because I’m still alive.’ 10 So I stood next to him and killed him, because I knew that he wouldn’t live after he had fallen. I took the crown that had been on his head, along with the bracelet that had been on his arm, and I have brought them to your majesty.”
11 On hearing this, David grabbed his clothes and tore them, as did all the men who were attending to him. 12 They mourned and wept, and then decided to fast until dusk for Saul, for his son Jonathan, for the army of the LORD, and for the house of Israel, because they had fallen in battle.
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!’”