2 Chronicles 35:18-20
35:18 A Passover like this had not been observed in Israel since the days of Samuel the prophet. None of the kings of Israel had observed a Passover like the one celebrated by Josiah, the priests, the Levites, all the people of Judah and Israel who were there, and the residents of Jerusalem.
35:19 This Passover was observed in the eighteenth year of Josiah’s reign.
Josiah’s Reign Ends
35:20 After Josiah had done all this for the temple, King Necho of Egypt marched up to do battle at Carchemish on the Euphrates River. Josiah marched out to oppose him.