2 Samuel 1:10-14

So 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.

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

And 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.

And David said unto the young man that told him, Whence art thou? And he answered, I am the son of a stranger, an Amalekite.

And David said unto him, How wast thou not afraid to stretch forth thine hand to destroy the LORD’s anointed?