1 Samuel 31:2-4

2And the Philistines followed hard upon Saul and upon his sons; and the Philistines smote Jonathan, and Abinadab, and Malchishua, Saul's sons.

3And the battle went sore against Saul, and the archers came up with him; and he was much terrified by the archers.

4Then said Saul to his armour-bearer, Draw thy sword, and thrust me through with it; lest these uncircumcised come and thrust me through, and abuse me. But his armour-bearer would not; for he was much afraid. So Saul took the sword and fell on it.