Surah Al-Baqarah, Verse 16

أُوْلَٰٓئِكَ ٱلَّذِينَ ٱشۡتَرَوُاْ ٱلضَّلَٰلَةَ بِٱلۡهُدَىٰ فَمَا رَبِحَت تِّجَٰرَتُهُمۡ وَمَا كَانُواْ مُهۡتَدِينَ١٦

ulāika alladhīna ish'tarawū l-ḍalālata bil-hudā famā rabiḥat tijāratuhum wamā kānū muh'tadīna

Those are the ones who have purchased error [in exchange] for guidance, so their transaction has brought no profit, nor were they guided.