2 Chronicles 35:22

The kings came and fought, then fought the kings of Canaan in Taanach by the waters of Megiddo; they took no gain of money.

And the king of Israel said unto Jehoshaphat, I will disguise myself, and will go to the battle; but put thou on thy robes. So the king of Israel disguised himself; and they went to the battle.

And the king of Israel said unto Jehoshaphat, I will disguise myself, and enter into the battle; but put thou on thy robes. And the king of Israel disguised himself, and went into the battle.

But he sent ambassadors to him, saying, What have I to do with thee, thou king of Judah? I come not against thee this day, but against the house wherewith I have war: for God commanded me to make haste: forbear thee from meddling with God, who is with me, that he destroy thee not.

And Jeroboam said to his wife, Arise, I pray thee, and disguise thyself, that thou be not known to be the wife of Jeroboam; and get thee to Shiloh: behold, there is Ahijah the prophet, which told me that I should be king over this people.

And a certain man drew a bow at a venture, and smote the king of Israel between the joints of the harness: wherefore he said unto the driver of his chariot, Turn thine hand, and carry me out of the host; for I am wounded.

And Jehoshaphat said unto the king of Israel, Enquire, I pray thee, at the word of the Lord to day. Therefore the king of Israel gathered together of prophets four hundred men, and said unto them, Shall we go to Ramoth–gilead to battle, or shall I forbear? And they said, Go up; for God will deliver it into the king’s hand. But Jehoshaphat said, Is there not here a prophet of the Lord besides, that we might enquire of him?

And his servants carried him in a chariot dead from Megiddo, and brought him to Jerusalem, and buried him in his own sepulchre. And the people of the land took Jehoahaz the son of Josiah, and anointed him, and made him king in his father’s stead.

But when Ahaziah the king of Judah saw this, he fled by the way of the garden house. And Jehu followed after him, and said, Smite him also in the chariot. And they did so at the going up to Gur, which is by Ibleam. And he fled to Megiddo, and died there.

And the men took of their victuals, and asked not counsel at the mouth of the Lord.

And he gathered them together into a place called in the Hebrew tongue Armageddon.

In that day shall there be a great mourning in Jerusalem, as the mourning of Hadadrimmon in the valley of Megiddon.