أَلَآ إِنَّهُمْ هُمُ ٱلْمُفْسِدُونَ وَلَٰكِن لَّا يَشْعُرُونَ
English Translation
Unquestionably, it is they who are the corrupters, but they perceive [it] not.
English Transliteration
Ala innahum humu almufsidoona walakin la yashAAuroona
Tafsir of Verse 12
Truly, they are the workers of corruption but they are not aware.
Of a surety, they are the ones who make mischief, but they realise (it) not.