Qur'anic Perfection and Infallibility

لَّا يَأْتِيهِ ٱلْبَـٰطِلُ مِنۢ بَيْنِ يَدَيْهِ وَلَا مِنْ خَلْفِهِۦ ۖ تَنزِيلٌ مِّنْ حَكِيمٍ حَمِيدٍ

Falsehood cannot approach it from before it or from behind it; [it is] a revelation from a [Lord who is] Wise and Praiseworthy.