It happened after the death of Saul, when David was returned from the slaughter of the Amalekites, and David had stayed two days in Ziklag; it happened on the third day, that behold, a man came out of the camp from Saul, with his clothes torn, and earth on his head: and so it was, when he came to David, that he fell to the earth, and showed respect. David said to him, "Where do you come from?" He said to him, "I have escaped out of the camp of Israel." read more.
David said to him, "How did it go? Please tell me." He answered, "The people have fled from the battle, and many of the people also have fallen and are dead; and Saul and Jonathan his son are dead also." David said to the young man who told him, "How do you know that Saul and Jonathan his son are dead?" The young man who told him said, "As I happened by chance on Mount Gilboa, behold, Saul was leaning on his spear; and behold, the chariots and the horsemen followed hard after him. When he looked behind him, he saw me, and called to me. I answered, 'Here I am.' He said to me, 'Who are you?' I answered him, 'I am an Amalekite.' He said to me, 'Please stand beside me, and kill me; for anguish has taken hold of me, because my life is yet whole in me.' So I stood beside him, and killed him, because I was sure that he could not live after that he had fallen. I took the crown that was on his head, and the bracelet that was on his arm, and have brought them here to my lord." Then David took hold on his clothes, and tore them; and likewise all the men who were with him. They mourned, and wept, and fasted until evening, 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. David said to the young man who told him, "Where are you from?" He answered, "I am the son of a foreigner, an Amalekite." David said to him, "How were you not afraid to put forth your hand to destroy the LORD's anointed?" David called one of the young men, and said, "Go near, and fall on him." He struck him, so that he died. 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.'"

So I stood beside him, and killed him, because I was sure that he could not live after that he had fallen. I took the crown that was on his head, and the bracelet that was on his arm, and have brought them here to my lord." Then David took hold on his clothes, and tore them; and likewise all the men who were with him. They mourned, and wept, and fasted until evening, 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.