Now the king of Israel and Jehoshaphat the king of Judah were sitting, each on his throne and dressed in royal robes, and they were sitting at the threshing floor at the entrance of the gate of Samaria, and all the prophets were prophesying before them. Bible see other translations

“threshing floor at the entrance.” This threshing floor would be outside the gate and since it was flat would be a convenient place to set up the kings’ thrones. The threshing floor would not be in the city. The kings “sat” while the prophets prophesied, and in the Bible, the word “sat” often indicates taking a ruling position (see commentary on the parallel record in 1 Kings 22:10).

Commentary for: 2 Chronicles 18:9