1 Samuel 31:4-5

Saul told the soldier who carried his weapons, “Kill me with your sword! I don't want those worthless Philistines to torture me and make fun of me.” But the soldier was afraid to kill him. Saul then took out his own sword; he stuck the blade into his stomach, and fell on it. When the soldier knew that Saul was dead, he killed himself in the same way.