Albert Barnes Commentary 1 Kings 22:7

"But Jehoshaphat said, Is there not here a prophet of Jehovah besides, that we may inquire of him?" — 1 Kings 22:7 (ASV)

Jehoshaphat was dissatisfied. These men—creatures of Ahab, tainted with the worship of calves if not with Baal-worship—had promised victory, but not in the name of Yahweh. Jehoshaphat, therefore, asked, “Is there not here a true prophet of Yahweh besides these 400 professed prophets?”