1 Kings 22:13,14

Speak that which is good This was a most absurd request: for if Micaiah was a true prophet, he could say nothing but what was suggested to him by divine inspiration, and if he were not, why should he speak at all? Of what use could his prophesying be unless to deceive? What the Lord saith unto me, that will I speak What answer the Lord shall put into my mind and mouth. He resolves as became one who had an eye to a greater king than either of these. He seems, as yet, to have had no revelation about the matter. But when the question was put to him, God taught him what to answer.