Verse 42

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

No falsehood had ever entered it in the past and nor will it ever enter in the future. It is a revelation from the One who is All Wise, Praiseworthy.