At-Tur 52:31

إِنَّا كُنَّا مِن قَبْلُ نَدْعُوهُ ۖ إِنَّهُ هُوَ الْبَرُّ الرَّحِيمُ

Indeed, we used to supplicate Him before. Indeed, it is He who is the Beneficent, the Merciful."

فَذَكِّرْ فَمَا أَنتَ بِنِعْمَتِ رَبِّكَ بِكَاهِنٍ وَلَا مَجْنُونٍ

So remind [O Muhammad], for you are not, by the favor of your Lord, a soothsayer or a madman.

أَمْ يَقُولُونَ شَاعِرٌ نَّتَرَبَّصُ بِهِ رَيْبَ الْمَنُونِ

Or do they say [of you], "A poet for whom we await a misfortune of time?"

أَمْ تَأْمُرُهُمْ أَحْلَامُهُم بِهَـٰذَا ۚ أَمْ هُمْ قَوْمٌ طَاغُونَ

Or do their minds command them to [say] this, or are they a transgressing people?

أَمْ يَقُولُونَ تَقَوَّلَهُ ۚ بَل لَّا يُؤْمِنُونَ

Or do they say, "He has made it up"? Rather, they do not believe.

فَلْيَأْتُوا بِحَدِيثٍ مِّثْلِهِ إِن كَانُوا صَادِقِينَ

Then let them produce a statement like it, if they should be truthful.