The high priesthood had been for some time in a certain sense divided between Zadok and Abiathar. (See the 1 Kings 1:8 note). Henceforth, Zadok became sole high priest.

And the king put Benaiah the son of Jehoiada in his room over the host,.... Advanced him from being captain of his bodyguards to be general of the army:

and Zadok the priest did he put in the room of Abiathar; from a common priest he promoted him to the high priesthood; whereby that office was restored to its ancient line, the family or Eleazar, having been in the line of Ithamar for many years; and the prediction of the destruction of Eli's house, made eighty years ago, began to be fulfilled, 1 Samuel 2:31.

Solomon appointed Benaiah commander-in-chief in the place of Joab, and put Zadok in Abiathar's place (cf. 1 Kings 1:8-9).

And the king put Benaiah the son of Jehoiada in his room over the host: and Zadok the {r} priest did the king put in the room of Abiathar.

(r) And so took the office of high priest from the house of Eli, and restored it to the house of Phinehas.

2:35-46 The old malignity remains in the unconverted heart, and a watchful eye should be kept on those who, like Shimei, have manifested their enmity, but have given no evidence of repentance. No engagements or dangers will restrain worldly men; they go on, though they forfeit their lives and souls. Let us remember, God will not accommodate his judgment to us. His eye is over us; and let us strive to walk as in his presence. Let our every act, word, and thought, be governed by this great truth, that the hour is quickly coming when the smallest circumstances of our lives shall be brought to light, and our eternal state be fixed by a righteous and unerring God. Thus Solomon's throne was established in peace, as the type of the Redeemer's kingdom of peace and righteousness. And it is a comfort, in reference to the enmity of the church's enemies, that, how much soever they rage, it is a vain thing they imagine. Christ's throne is established, and they cannot shake it.