1 Chronicles 10:5

10:5 When his armor bearer saw that Saul was dead, he also fell on his sword and died.

1 Chronicles 10:4

10:4 Saul told his armor bearer, “Draw your sword and stab me with it. Otherwise these uncircumcised people will come and torture me.” But his armor bearer refused to do it, because he was very afraid. So Saul took the sword and fell on it.