1 Chronicles 10:5 in the King James Version
And when his armourbearer saw that Saul was dead, he fell likewise on the sword, and died.
Context
4 Then Saul said to his armor bearer, “Draw your sword, and thrust me through with it, lest these uncircumcised come and abuse me.” But his armor bearer would not, for he was terrified. Therefore Saul took his sword and fell on it.
5 When his armor bearer saw that Saul was dead, he likewise fell on his sword and died.
6 So Saul died with his three sons; and all his house died together.