1 Samuel 31:1

And the Philistines followed hard upon Saul and upon his sons; and the Philistines slew Jonathan, and Abinadab, and Malchi-shua, Saul's sons.

And the battle went sore against Saul, and the archers hit him; and he was sore wounded of the archers.

Then said Saul unto his armourbearer, Draw thy sword, and thrust me through therewith; lest these uncircumcised come and thrust me through, and abuse me. But his armourbearer would not; for he was sore afraid. Therefore Saul took a sword, and fell upon it.

And when his armourbearer saw that Saul was dead, he fell likewise upon his sword, and died with him.