'Armor bearers' in the Bible

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

And when his armour-bearer saw that Saul was dead, he fell likewise on the sword, and died.

Zelek the Ammonite, Naharai the Berothite, the armour-bearer of Joab the son of Zeruiah,