1 Samuel 31:4-7
New International Version
But his armor-bearer was terrified and would not do it; so Saul took his own sword and fell on it. 5 When the armor-bearer saw that Saul was dead, he too fell on his sword and died with him. 6 So Saul and his three sons and his armor-bearer and all his men died(C) together that same day.
7 When the Israelites along the valley and those across the Jordan saw that the Israelite army had fled and that Saul and his sons had died, they abandoned their towns and fled. And the Philistines came and occupied them.