2 Samuel 8:18

18Benaiah the son of Jehoiada was [head] over both the Cherethites and Pelethites [the king’s bodyguards]; and David’s sons were 8:18 Lit priests. Even though the Hebrew word for priests is used in this verse, David’s sons would not serve as priests because they were from the tribe of Judah, not Levi. The ancient rabbis interpreted the statement to mean that the sons enjoyed some priestly privileges.chief [confidential] advisers (officials) [to the king]. [1 Chr 18:17]