2 Samuel 8:17

“And Zadok the son of Ahitub, and Ahimelech the son of Abiathar, [were] the priests, etc.] Not high priests, as Josephus f153 suggests, for there was only one high priest at a time; indeed there was a “sagan”, or deputy priest, on occasion; and so Abarbinel says that Zadok was the high priest, and Ahimelech his second or deputy; but the truth of the case was this, Abiathar was high priest only, and continued so until the time of Solomon, when he was thrust out of his office, and Zadok put into it; and Ahimelech his son and Zadok were the principal priests under him, the one of the family of Ithamar, the other of Eleazar; so the Targum on (<131816>1 Chronicles 18:16) calls them “sagans”, or…”

“Zadok . . . and Ahimelech . . . were the priests--On the massacre of the priests at Nob, [Sa1 22:19], Saul conferred the priesthood on Zadok, of the family of Eleazar (Ch1 6:50), while David acknowledged Ahimelech, of Ithamar's family, who fled to him. The two high priests exercised their office under the respective princes to whom they were attached. But, on David's obtaining the kingdom over all Israel, they both retained their dignity; Ahimelech officiating at Jerusalem, and Zadok at Gibeon (Ch1 16:39).”

“For a similar account of the officers of Solomon’s kingdom, see 1 Kings 4:1-6, where Jehoshaphat is still the recorder, and Benaiah is advanced to be captain of the host in the room of Joab. The recorder seems to have been a high officer of state, a kind of chancellor, whose office was to keep a record of the events of the kingdom for the king’s information, and hence, he would naturally be the king’s adviser. See Esther 6:1-2; Isaiah 36:22; 2 Chronicles 34:8. Such an officer is found among the ancient Egyptians and Persians. Ahimelech the son of Abiathar - According to 1 Samuel 22:9-23, Abiathar, Zadok’s colleague, was the son of Ahimelech. Abiathar the son of Ahimelech continued to be…”

“Scribe - Or, secretary of state. 2 Kings (2 Samuel) 8:18”

“Zadok: Ch1 6:8, Ch1 6:53, Ch1 24:3, Ch1 24:4 and Seraiah: Ch1 18:16, Shavsha scribe: or, secretary 2 Kings (2 Samuel) 8:18”

“Zadok the son of Ahitub, of the line of Eleazar ( Ch1 6:8; Ch1 6:11-12), and Ahimelech the son of Abiathar, were cohanim, i.e., officiating high priests; the former at the tabernacle at Gibeon ( Ch1 16:39), the latter probably at the ark of the covenant upon Mount Zion. Instead of Ahimelech, the Chronicles have Abimelech, evidently through a copyist's error, as the name is written Ahimelech in Ch1 24:3, Ch1 24:6. But the expression "Ahimelech the son of Abiathar" is apparently a very strange one, as Abiathar was a son of Ahimelech according to Sa1 22:20, and in other passages Zadok and Abiathar are mentioned as the two high priests in the time of David ( Sa2 15:24, Sa2 15:35; Sa2 17:15; Sa2…”