2 Samuel 1:8-16

8 “He asked me, ‘Who are you?’
“‘An Amalekite,’ I answered.

9 “Then he said to me, ‘Stand over me and kill me! I am in the throes of death, but I’m still alive.’

10 “So I stood over him and killed him, because I knew that after he had fallen he could not survive. And I took the crown that was on his head and the band on his arm and have brought them here to my lord.”

11 Then David and all the men with him took hold of their clothes and tore them.

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

13 David said to the young man who brought him the report, “Where are you from?”
“I am the son of an alien, an Amalekite,” he answered.

14 David asked him, “Why were you not afraid to lift your hand to destroy the Lord’s anointed?”

15 Then David called one of his men and said, “Go, strike him down!” So he struck him down, and he died.

16 For David had said to him, “Your blood be on your own head. Your own mouth testified against you when you said, ‘I killed the Lord’s anointed.’”