1 Samuel 31:1-4

Now the Philistines fought against Israel: and the men of Israel fled from before the Philistines, and fell down slain in mount Gilboa. And the Philistines followed hard upon Saul and upon his sons; and the Philistines slew Jonathan, and Abinadab, and Malchi-shua, the sons of Saul. And the battle went sore against Saul, and the archers overtook him; and he was greatly distressed by reason of the archers. Then said Saul to his armorbearer, Draw thy sword, and thrust me through therewith, lest these uncircumcised come and thrust me through, and abuse me. But his armorbearer would not; for he was sore afraid. Therefore Saul took his sword, and fell upon it.