2 Kings 23:22-23
Surely there was not holden such a passover from the days of the judges that judged Israel, nor in all the days of the kings of Israel, nor of the kings of Judah; But in the eighteenth year of king Josiah, wherein this passover was holden to the LORD in Jerusalem.
2 Chronicles 35:1
Moreover Josiah kept a passover unto the LORD in Jerusalem: and they killed the passover on the fourteenth day of the first month.
2 Chronicles 35:18
And there was no passover like to that kept in Israel from the days of Samuel the prophet; neither did all the kings of Israel keep such a passover as Josiah kept, and the priests, and the Levites, and all Judah and Israel that were present, and the inhabitants of Jerusalem.