"If you have any doubt regarding what We revealed to our servant, 

then produce one sura like these, and call upon your own 

witnesses against ALLAH, if you are truthful." 

2:23 

"Say, "If all the humans and all the jinns banded together in order to produce 

a Quran like this, they could never produce anything like it, no 

matter how much assistance they lend one another." 

17:88