1 Samuel 22:14

22:14 Ahimelech replied to the king, “Who among all your servants is faithful like David? He is the king’s son-in-law, the leader of your bodyguard, and honored in your house!

1 Samuel 28:2

28:2 David replied to Achish, “That being the case, you will come to know what your servant can do!” Achish said to David, “Then I will make you my bodyguard from now on.”