Sura al-Baqara 2:256

لَآ إِكْرَاهَ فِى ٱلدِّينِ قَد تَّبَيَّنَ ٱلرُّشْدُ مِنَ ٱلْغَىِّ فَمَن يَكْفُرْ بِٱلطَّٰغُوتِ وَيُؤْمِنۢ بِٱللَّـهِ فَقَدِ ٱسْتَمْسَكَ بِٱلْعُرْوَةِ ٱلْوُثْقَىٰ لَا ٱنفِصَامَ لَهَا وَٱللَّـهُ سَمِيعٌ عَلِيمٌ

lā ikrāha fī l-dīni qad tabayyana l-rushdu mina l-ghayyi fa-man yakfur bil-ṭāghūti wa-yuʾmin billāhi fa-qadi istamsaka bil-ʿurwati l-wuthqā lā infiṣāma lahā wallāhu samīʿun ʿalīmun

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.