2 Chronicles 34:6
And so did he in the cities of Manasseh, and Ephraim, and Simeon, even unto Naphtali, with their mattocks round about.
Cross-reference
2 Chronicles 31:1
Parallel
2 Chronicles 31:1 describes Hezekiah's people destroying altars in Ephraim and Manasseh — a direct parallel to Josiah's similar reform.
2 Chronicles 30:1
Historical context
2 Chronicles 30:1 shows Hezekiah sending letters to Ephraim and Manasseh for Passover — same northern regions Josiah later purges of idols.
2 Kings 23:15–20
Parallel
2 Kings 23:15-20 gives the parallel account of Josiah destroying the Bethel altar and high places in Samaritan cities.
2 Kings 23:19
Parallel
2 Kings 23:19 is the parallel account of Josiah removing high places in Samaria's cities, matching the same reform.