Surah Al-Haqqah, verse 39

لَّا يَأْكُلُهُۥٓ إِلَّا ٱلْخَـٰطِـُٔونَ ﴿٣٧﴾

None will eat it except the sinners.

فَلَآ أُقْسِمُ بِمَا تُبْصِرُونَ ﴿٣٨﴾

So I swear by what you see

إِنَّهُۥ لَقَوْلُ رَسُولٍۢ كَرِيمٍۢ ﴿٤٠﴾

[That] indeed, it [i.e., the Qur’ān] is the word of a noble Messenger.

وَمَا هُوَ بِقَوْلِ شَاعِرٍۢ ۚ قَلِيلًۭا مَّا تُؤْمِنُونَ ﴿٤١﴾

And it is not the word of a poet; little do you believe.