1 Kings 2:27

So Solomon thrust out Abtathar from being priest unto the Lord, that he might fulfil [Heb. to fulfil "An addition of the narrator, not the intention of Solomon. It is the ἵνα πληρωθῇ of the New Testament." Bähr] the word of the Lord, which he spake concerning the house of Eli in Shiloh [ 1 Samuel 2:31-35 . Abiathar was the last descendant of the house of Ithamar. With his deposition the high priesthood reverted to the house of Eleazar, and so another "word of the Lord" had its fulfilment ( Numbers 25:15 ).]

No one can justly accuse Solomon of unnecessary severity or of cruelty in his treatment of Abiathar. On the occasion of his first conspiracy, Abiathar seems to have escaped even censure. And yet that conspiracy, had it succeeded, would almost certainly have involved Solomon's death ( 1 Samuel 1:12 ). He is now found plotting again, for the action of Solomon proves that there had been a second plot. Oriental usages would have justified his death. He is simply warned and banished.