2 Samuel 1:10 KJV

8And he said unto me, Who art thou? And I answered him, I am an Amalekite.

9He said unto me again, Stand, I pray thee, upon me, and slay me: for anguish is come upon me, because my life is yet whole in me.

10So I stood upon him, and slew him, because I was sure that he could not live after that he was fallen: and I took the crown that was upon his head, and the bracelet that was on his arm, and have brought them hither unto my lord.

11Then David took hold on his clothes, and rent them; and likewise all the men that were with him:

12And they mourned, and wept, and fasted until even, for Saul, and for Jonathan his son, and for the people of the LORD, and for the house of Israel; because they were fallen by the sword.