Charles Ellicott Commentary 1 Kings 22:10

"Now the king of Israel and Jehoshaphat the king of Judah were sitting each on his throne, arrayed in their robes, in an open place at the entrance of the gate of Samaria; and all the prophets were prophesying before them." — 1 Kings 22:10 (ASV)

Each on his throne. —The description evidently implies that, having reluctantly consented to send for Micaiah, Ahab seeks to overawe him by display not only of royal pomp, but of prophetic inspiration, professing that it came, like his own, from the Lord Jehovah.