Qur'anic inimitability (I'jaz)

وَمَا يَنۢبَغِى لَهُمْ وَمَا يَسْتَطِيعُونَ

It is not allowable for them, nor would they be able.

إِنْ هَـٰذَآ إِلَّا قَوْلُ ٱلْبَشَرِ

This is not but the word of a human being."