2:256
لاَ إِكْرَاهَ فِي الدِّينِ قَد تَّبَيَّنَ الرُّشْدمِنَ الْغَيِّ فَمَنْ يَكْفُرْ بِالطَّاغُوتِ وَيُؤْمِن بِاللّهِ فَقَدِ اسْتَمْسَكَ بِالْعُرْوَةِ الْوُثْقَىَ لاَ انفِصَامَ لَهَا وَاللّهُ سَمِيعٌ عَلِيمٌ
Let there be no compulsion in religion: Truth stands out clear from Error: whoever rejects evil and believes in Allah hath grasped the most trustworthy hand-hold, that never breaks. And Allah heareth and knoweth all things.