Divine authenticity of the Quran

وَبِٱلْحَقِّ أَنزَلْنَـٰهُ وَبِٱلْحَقِّ نَزَلَ ۗ وَمَآ أَرْسَلْنَـٰكَ إِلَّا مُبَشِّرًا وَنَذِيرًا

And with the truth We have sent it [i.e., the Qur’ān] down, and with the truth it has descended. And We have not sent you, [O Muḥammad], except as a bringer of good tidings and a warner.