Surah Az-Zukhruf, ayah 37

وَإِنَّهُمۡ لَيَصُدُّونَهُمۡ عَنِ ٱلسَّبِيلِ وَيَحۡسَبُونَ أَنَّهُم مُّهۡتَدُونَ ٣٧

Wa innahum layasuddūnahum 'anis-sabīli wayahsabūna annahum muhtadūn

And indeed, they [i.e., the devils] avert them from the way [of guidance] while they think that they are [rightly] guided