There came a prophet - Who this was we cannot tell; Jarchi says it was Micaiah, son of Imlah. It is strange that on such an occasion we hear nothing of Elijah or Elisha. Is it not possible that this was one of them disguised?
The rabbinical commentators conjecture that this prophet was Micaiah, the son of Imlah, who is mentioned below 1 Kings 22:8.
Hast thou seen all this great multitude? - The boast of Ben-hadad 1 Kings 20:10, was not without a basis of truth; his force seems to have exceeded 130,000 (compare 1 Kings 20:25, 1 Kings 20:29-30). In his wars with the Assyrians we find him sometimes at the head of 100,000 men.