1 Kings 22:15

15 When Micaiah arrived before the king, Ahab asked him, “Micaiah, should we go to war against Ramoth-gilead, or should we hold back?” Micaiah replied sarcastically, “Yes, go up and be victorious, for the LORD will give the king victory!”

1 Kings 22:15 Meaning and Commentary

1 Kings 22:15

So he came to the king
Being introduced by the officer:

and the king said unto him, Micaiah, shall we go up against
Ramothgilead to battle, or shall we forbear?
the same question in the same words that was put to the other prophets, ( 1 Kings 22:6 ) , only there he uses the singular number, here the plural, including Jehoshaphat with him:

and he answered him, go, and prosper: for the Lord shall deliver [it]
into the hand of the king;
he answered not in the name of the Lord, saying, "thus saith the Lord", nor did he speak his own sense and in his own words, nor seriously, but by way of derision; he took up the words of the prophets, and bantered them; it is as if he should say, the prophets bid you go, and tell you that you shall "prosper", and that the city will be delivered into the king's hand; do as they direct you, and see what the issue will be, no doubt it will be good, since they are all agreed; but he delivered the above words with such gestures, and such a tone, and with a contemptuous smile in his countenance, which showed that he spoke not seriously, but sarcastically; and this the king plainly discovered, as appears by what follows.

1 Kings 22:15 In-Context

13 Meanwhile, the messenger who went to get Micaiah said to him, “Look, all the prophets are promising victory for the king. Be sure that you agree with them and promise success.”
14 But Micaiah replied, “As surely as the LORD lives, I will say only what the LORD tells me to say.”
15 When Micaiah arrived before the king, Ahab asked him, “Micaiah, should we go to war against Ramoth-gilead, or should we hold back?” Micaiah replied sarcastically, “Yes, go up and be victorious, for the LORD will give the king victory!”
16 But the king replied sharply, “How many times must I demand that you speak only the truth to me when you speak for the LORD ?”
17 Then Micaiah told him, “In a vision I saw all Israel scattered on the mountains, like sheep without a shepherd. And the LORD said, ‘Their master has been killed. Send them home in peace.’”
Holy Bible. New Living Translation copyright© 1996, 2004, 2007, 2013 by Tyndale House Foundation. Used by permission of Tyndale House Publishers Inc., Carol Stream, Illinois 60188. All rights reserved.