1 Samuel 31:7-9

Amplified Bible

⁷ When the men of Israel who were on the other side of the valley [of Jezreel], and those who were beyond the Jordan, saw that the other men of Israel had fled and that Saul and his sons were dead, they abandoned the cities and fled; then the Philistines came and lived in them.

⁸ The next day, when the Philistines came to plunder the dead, they found Saul and his three sons fallen on Mount Gilboa. ⁹ So they cut off Saul’s head and stripped off his weapons and armor and sent them throughout the land of the Philistines, to bring the good news to the house of their idols and to the people.