Allah says in Surah al-Mulk:

They will say, “Yes, a warner did come to us, but we disbelieved, and said, ‘Allah did not send down anything; you are very much mistaken.’” (Verse 9)

It is well known that the unbelievers do not recognize the prophets in this world. They accuse the prophets of lying, fortune-tellers, deceit and do disorders. But this is not hidden from Allah's sight. At least, when they are in the Fire on the Day of Resurrection, with His justice, Allah will bring forth from their mouths the words of them, which they have confessed their own fault. Now let us hear the confession of the cause of the infidels in hell.