1 Samuel 31:4-5

4Saul said to his armor bearer, “Draw your sword and pierce me through with it, otherwise these uncircumcised [Philistines] will come and pierce me through and abuse and mock me.” But his armor bearer would not, because he was terrified [of doing such a thing]. So Saul took his sword and fell on it.

5When his armor bearer saw that Saul was dead, he also fell on his sword and died with him.