Quran Al-A'raf 7:30
فَرِيقًا هَدَىٰ وَفَرِيقًا حَقَّ عَلَيۡهِمُ ٱلضَّلَٰلَةُۚ إِنَّهُمُ ٱتَّخَذُواْ ٱلشَّيَٰطِينَ أَوۡلِيَآءَ مِن دُونِ ٱللَّهِ وَيَحۡسَبُونَ أَنَّهُم مُّهۡتَدُونَ ٣٠
Translation
A group [of you] He guided, and a group deserved [to be in] error. Indeed, they [i.e., the latter] had taken the devils as allies instead of Allāh while they thought that they were guided.