“And he shall have it, and his seed after him, even the covenant of an everlasting priesthood; because he was zealous for his God, and made an atonement for the children of Israel.”
King James Version (KJV)
25:13 At everlasting priesthood - To continue as long as the law and common - wealth of the Jews did. But this promise was conditional, and therefore might be made void, by the miscarriages of Phinehas's sons, as it seems it was, and thereupon a like promise was made to Eli of the line of Ithamar, that he and his should walk before the Lord, namely, in the office of high - priest, for ever, which also for his and their sins was made void, #1Sam 2:30|. And the the priesthood returned to Phinehas's line in the time of Solomon, #1Kings 2:26|,27,34.