1 Kings 22:10

And the king of Israel, and Jehoshaphat the king of Judah, sat
each on his throne
In great state and majesty:

having put on their robes;
their royal robes, which they wore when they appeared in pomp and grandeur:

in a void place in the entrance of the gate of Samaria;
where courts of judicature were held, and there was an open void space for the people to assemble in to hear; the word has the signification of a corn floor, and the Jews suppose they and their attendants sat in a semicircle like the half of a corn floor, after the same manner in which they say the sanhedrim at Jerusalem sat ^F15:

and all the prophets prophesied before them;
concerning this affair of going to Ramothgilead.