10:100
وَمَا كَانَ لِنَفْسٍ أَن تُؤْمِنَ إِلَّا بِإِذْنِ ٱللَّهِ ۚ وَيَجْعَلُ ٱلرِّجْسَ عَلَى ٱلَّذِينَ لَا يَعْقِلُونَ
Wa maa kaana linafsin an tu'mina illaa bi iznil laah; wa yaj'alur rijsa 'alal lazeena laa ya'qiloon
No soul can believe, except by the will of Allah, and He will place doubt (or obscurity) on those who will not understand.
