When king Ahab sent for Micaiah to prophesy about the battle against Syria he gave a solemn promise that he will only speak what the Lord told him.Then Micaiah went on to prophecy victory against the syrians
1 Kings 22:15 (KJV)
15 Then he came to the king; and the king said to him, “Micaiah, shall we go to war against Ramoth Gilead, or shall we refrain?” And he answered him, “Go and prosper, for the LORD will deliver it into the hand of the king!”
But after being proded further Micaiah prophesies a negative outcome for Israel
1 Kings 22:19-23 (KJV)
19 Then Micaiah said, “Therefore hear the word of the LORD: I saw the LORD sitting on His throne, and all the host of heaven standing by, on His right hand and on His left. 20 And the LORD said, ‘Who will persuade Ahab to go up, that he may fall at Ramoth Gilead?’ So one spoke in this manner, and another spoke in that manner. 21 Then a spirit came forward and stood before the LORD, and said, ‘I will persuade him.’ 22 The LORD said to him, ‘In what way?’ So he said, ‘I will go out and be a lying spirit in the mouth of all his prophets.’ And the LORD said, ‘You shall persuade him, and also prevail. Go out and do so.’ 23 Therefore look! The LORD has put a lying spirit in the mouth of all these prophets of yours, and the LORD has declared disaster against you.”
Was Micaiah's initial prophecy meant to be an irony?