Concise Quran Commentary
It is they who are the fools, because they exchanged faith for disbelief; and this exchange did not help them in any way, because they lost their faith in Allah and lost the way to the truth.
Tafsir for this Ayah
Surah 2 : Ayah 16
Surah 2 : Ayah 16
أُو۟لَـٰٓئِكَ ٱلَّذِينَ ٱشْتَرَوُا۟ ٱلضَّلَـٰلَةَ بِٱلْهُدَىٰ فَمَا رَبِحَت تِّجَـٰرَتُهُمْ وَمَا كَانُوا۟ مُهْتَدِينَ
They are those who purchased misguidance for guidance, but their trade was profitless, and they were not guided.