'Body guard' in the Bible

Ahimelech replied to the king: “Who among all your servants is as faithful as David? He is the king’s son-in-law, captain of your bodyguard, and honored in your house.

David replied to Achish, “Good, you will find out what your servant can do.”So Achish said to David, “Very well, I will appoint you as my permanent bodyguard.”

He was the most honored of the Thirty, but he did not become one of the Three. David put him in charge of his bodyguard.

He was the most honored of the Thirty, but he did not become one of the Three. David put him in charge of his bodyguard.