وَمَا قَدَرُواْ ٱللَّهَ حَقَّ قَدۡرِهِۦٓ إِذۡ قَالُواْ مَآ أَنزَلَ ٱللَّهُ عَلَىٰ بَشَرٖ مِّن شَيۡءٖۗ قُلۡ مَنۡ أَنزَلَ ٱلۡكِتَٰبَ ٱلَّذِي جَآءَ بِهِۦ مُوسَىٰ نُورٗا وَهُدٗى لِّلنَّاسِۖ تَجۡعَلُونَهُۥ قَرَاطِيسَ تُبۡدُونَهَا وَتُخۡفُونَ كَثِيرٗاۖ وَعُلِّمۡتُم مَّا لَمۡ تَعۡلَمُوٓاْ أَنتُمۡ وَلَآ ءَابَآؤُكُمۡۖ قُلِ ٱللَّهُۖ ثُمَّ ذَرۡهُمۡ فِي خَوۡضِهِمۡ يَلۡعَبُونَ
They (the Jews, Quraish pagans, idolaters, etc.) did not estimate Allah with an estimation due to Him when they said: "Nothing did Allah send down to any human being (by inspiration)." Say (O Muhammad SAW): "Who then sent down the Book which Musa (Moses) brought, a light and a guidance to mankind which you (the Jews) have made into (separate) papersheets, disclosing (some of it) and concealing (much). And you (believers in Allah and His Messenger Muhammad SAW), were taught (through the Quran) that which neither you nor your fathers knew." Say: "Allah (sent it down)." Then leave them to play in their vain discussions. (Tafsir Al-Qurtubi, Vol. 7, Page 37).
وَهَٰذَا كِتَٰبٌ أَنزَلۡنَٰهُ مُبَارَكٞ مُّصَدِّقُ ٱلَّذِي بَيۡنَ يَدَيۡهِ وَلِتُنذِرَ أُمَّ ٱلۡقُرَىٰ وَمَنۡ حَوۡلَهَاۚ وَٱلَّذِينَ يُؤۡمِنُونَ بِٱلۡأٓخِرَةِ يُؤۡمِنُونَ بِهِۦۖ وَهُمۡ عَلَىٰ صَلَاتِهِمۡ يُحَافِظُونَ
And this (the Quran) is a blessed Book which We have sent down, confirming (the revelations) which came before it, so that you may warn the Mother of Towns (i.e. Makkah) and all those around it. Those who believe in the Hereafter believe in (the Quran), and they are constant in guarding their Salat (prayers).