And Iblees had already confirmed through them his assumption, so they followed him, except for a party of believers.
The Saheeh International Quran Translation
وَلَقَدْ صَدَّقَ عَلَيْهِمْ إِبْلِيسُ ظَنَّهُۥ فَٱتَّبَعُوهُ إِلَّا فَرِيقًا مِّنَ ٱلْمُؤْمِنِينَAnd Iblees had already confirmed through them his assumption, so they followed him, except for a party of believers.