Divine Protection of the Quran

وَلَا يَأْتُونَكَ بِمَثَلٍ إِلَّا جِئْنَـٰكَ بِٱلْحَقِّ وَأَحْسَنَ تَفْسِيرًا

And they do not come to you with an example [i.e., argument] except that We bring you the truth and the best explanation.