فَرِيقًا هَدَىٰ وَفَرِيقًا حَقَّ عَلَيۡهِمُ ٱلضَّلَٰلَةُۚ إِنَّهُمُ ٱتَّخَذُواْ ٱلشَّيَٰطِينَ أَوۡلِيَآءَ مِن دُونِ ٱللَّهِ وَيَحۡسَبُونَ أَنَّهُم مُّهۡتَدُونَ ٣٠
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.
Translation: Saheeh International (English)
Each word's meaning and sound
Allah made people into two groups: one group of them He guided, making it easy for them to find guidance and removing the barriers to it; and another He made go astray from the path of truth, because they made the satans their friends and helpers instead of Allah, ignorantly becoming bound to them, considering themselves to be correctly guided to a straight path.
Al-Mukhtasar in interpreting the Noble Quran