Qur'an 43:37

وَإِنَّهُمْ لَيَصُدُّونَهُمْ عَنِ ٱلسَّبِيلِ وَيَحْسَبُونَ أَنَّهُم مُّهْتَدُونَ

And lo! they surely turn them from the way of Allah, and yet they deem that they are rightly guided;