Kings III 22:29

29 So the king of Israel went up, and Josaphat king of Juda with him to Remmath Galaad.

Kings III 22:29 In-Context

27 and tell Joas the king's son to put this in prison, and to feed him with bread of affliction and water of affliction until I return in peace.
28 And Michaias said, If thou return at all in peace, the Lord has not spoken by me.
29 So the king of Israel went up, and Josaphat king of Juda with him to Remmath Galaad.
30 And the king of Israel said to Josaphat king of Juda, I will disguise myself, and enter into the battle, and do thou put on my raiment. So the king of Israel disguised himself, and went into the battle.
31 And the king of Syria had charged the thirty-two captains of his chariots, saying, Fight not small or great, but against the king of Israel only.

The Brenton translation of the Septuagint is in the public domain.