2 Kings 23:21 - Albert Barnes' Notes on the Bible

See 2 Kings 23:4 note. With this verse the author returns to the narrative of what was done in Josiah’s 18th year. The need of the injunction, “as it was written in the book of this covenant,” was owing to the fact - not that Josiah had as yet held no Passover - but that the reading of the book had shown him differences between the existing practice and the letter of the Law - differences consequent upon negligence, or upon the fact that tradition had been allowed in various points to override the Law.