2 Samuel 1:13-16

13 And David said to the young man that told him, From where are you? And he answered, I am the son of a stranger, an Amalekite.

14 And David said to him, How were you not afraid to stretch forth your hand to destroy the LORD's anointed?

15 And David called one of the young men, and said, Go near, and fall on him. And he smote him that he died.

16 And David said to him, Your blood be on your head; for your mouth has testified against you, saying, I have slain the LORD's anointed.