Divine revelation and the authenticity of the Qur'an

وَهَـٰذَا كِتَـٰبٌ أَنزَلْنَـٰهُ مُبَارَكٌ مُّصَدِّقُ ٱلَّذِى بَيْنَ يَدَيْهِ وَلِتُنذِرَ أُمَّ ٱلْقُرَىٰ وَمَنْ حَوْلَهَا ۚ وَٱلَّذِينَ يُؤْمِنُونَ بِٱلْـَٔاخِرَةِ يُؤْمِنُونَ بِهِۦ ۖ وَهُمْ عَلَىٰ صَلَاتِهِمْ يُحَافِظُونَ

And this is a Book which We have sent down, blessed and confirming what was before it, that you may warn the Mother of Cities [i.e., Makkah] and those around it. Those who believe in the Hereafter believe in it, and they are maintaining their prayers.