2 Samuel 1:11

7When he looked behind him, he saw me and called to me. I answered, ‘Here I am.’

8He said to me, ‘Who are you?’ I answered him, ‘I am an Amalekite.’

9He said to me, ‘Please stand beside me, and kill me, for anguish has taken hold of me because my life lingers in me.’

10So I stood beside him and killed him, because I was sure that he could not live after he had fallen. I took the crown that was on his head and the bracelet that was on his arm, and have brought them here to my lord.”

11Then David took hold of his clothes and tore them; and all the men who were with him did likewise.

12They mourned, wept, and fasted until evening for Saul and for Jonathan his son, and for the people of the LORD, and for the house of Israel, because they had fallen by the sword.

13David said to the young man who told him, “Where are you from?” He answered, “I am the son of a foreigner, an Amalekite.”

14David said to him, “Why were you not afraid to stretch out your hand to destroy the LORD’s anointed?”

15David called one of the young men and said, “Go near, and cut him down!” He struck him so that he died.