(23) Wherein.--Omit this word. As Ewald says, the meaning of these two verses is, that the passover was never so celebrated before, especially as regards (1) the offerings over and above the paschal lamb (Deuteronomy 16:2), and (2) the strict unity of the place of this festival (Deuteronomy 16:5). The assumption that no passover had ever been held before (De Wette), is obsolete, even among "advanced critics," and does not merit serious discussion.
Verse 23. - But in the eighteenth year of King Josiah, wherein this Passover was holden to the Lord in Jerusalem (compare, on the date, 2 Kings 22:3 and 2 Chronicles 35:19). The eighteenth year of Josiah corresponded probably, in part to B.C. 622, in part to B.C. 621.
23:15-24 Josiah's zeal extended to the cities of Israel within his reach. He carefully preserved the sepulchre of that man of God, who came from Judah to foretell the throwing down of Jeroboam's altar. When they had cleared the country of the old leaven of idolatry, then they applied themselves to the keeping of the feast. There was not holden such a passover in any of the foregoing reigns. The revival of a long-neglected ordinance, filled them with holy joy; and God recompensed their zeal in destroying idolatry with uncommon tokens of his presence and favour. We have reason to think that during the remainder of Josiah's reign, religion flourished.
But in the eighteenth year of king Josiah, wherein this passover was holden to the Lord in Jerusalem. This shows that Josiah must begin the reformation very early that year, since he did all that is before recorded in this and the preceding chapter by the fourteenth of Nisan, the day on which the passover was kept, which month answers to part of our March and part of April, see 2 Kings 22:3 and was the same year the repairs of the temple were finished.