2 Samuel 1:13-16

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.’”