1 Samuel 31:6-8

New American Standard Bible

⁶ So Saul died with his three sons, his armor bearer, and all his men on that day together.

⁷ 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.

⁸ 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.