2 Chronicles 35:22
Nevertheless Josiah would not turn his face from him, but disguised himself, that he might fight with him, and hearkened not unto the words of Necho from the mouth of God, and came to fight in the valley of Megiddo.
Cross-reference
2 Chronicles 35:21 is Necho's warning from God — Josiah fatally rejects it here, creating a contrast.
2 Chronicles 18:29 has King Ahab disguising himself before battle and dying — a direct parallel to Josiah's disguise here.
2 Chronicles 18:4-6 shows Ahab and Jehoshaphat inquiring of the Lord — contrast with Josiah who ignored God's command.
1 Kings 22:30 records Ahab's disguise before battle (parallel account to 2 Chr 18:29) — same as Josiah's fatal disguise.
1 Kings 22:34 describes Ahab's death after his disguise — echoing Josiah's death after disguising here.
2 Kings 23:30 gives the parallel account of Josiah's death at Megiddo, confirming the location and outcome of the battle.
Zechariah 12:11 references the mourning for Josiah at Megiddo as a simile for future great mourning in Jerusalem.
Revelation 16:16 calls the final battle site 'Armageddon' (Har Megiddo), connecting Josiah's fatal battle to the eschatological conflict.
Joshua 9:14 records Israel failing to ask the Lord's counsel — parallel to Josiah's failure to heed God's warning.
Judges 5:19 mentions battle at Megiddo — the same location where Josiah fights and dies here.
2 Kings 9:27 records Ahaziah's death at Megiddo — another Judah king dying at that location.