Certainty in revelation

إِنَّ هَـٰذَا لَهُوَ ٱلْقَصَصُ ٱلْحَقُّ ۚ وَمَا مِنْ إِلَـٰهٍ إِلَّا ٱللَّهُ ۚ وَإِنَّ ٱللَّهَ لَهُوَ ٱلْعَزِيزُ ٱلْحَكِيمُ

Indeed, this is the true narration. And there is no deity except Allāh. And indeed, Allāh is the Exalted in Might, the Wise.