2 Samuel 1:10-12

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

11Then David grasped his own clothes and tore them [in mourning]; so did all the men who were with him.

12They mourned and wept and fasted until evening for Saul and Jonathan his son, and for the Lord’s people and the house of Israel, because they had fallen by the sword [in battle].