1 Samuel 31:6-10

So Saul died with his three sons, his armor bearer, and all his men on that day together.

Now when the people of Israel who were on the other side of the valley, with those who were beyond the Jordan, saw that the men of Israel had fled and that Saul and his sons were dead, they abandoned the cities and fled; then the Philistines came and settled in them.

It came about on the next day, when the Philistines came to strip those killed, that they found Saul and his three sons fallen on Mount Gilboa.

They cut off his head and stripped off his weapons, and sent them throughout the land of the Philistines, to bring the good news to the house of their idols and to the people.

They put his weapons in the temple of Ashtaroth, and they nailed his body to the wall of Beth-shan.