Surah Al-Baqarah (The Cow), Verse 256

لَاۤ اِكْرَاهَ فِی الدِّیْنِ قَدْ تَّبَیَّنَ الرُّشْدُ مِنَ الْغَیِّ فَمَنْ یَّكْفُرْ بِالطَّاغُوْتِ وَیُؤْمِنْ بِاللّٰهِ فَقَدِ اسْتَمْسَكَ بِالْعُرْوَةِ الْوُثْقٰی لَا انْفِصَامَ لَهَا وَاللّٰهُ سَمِیْعٌ عَلِیْمٌ ۟

Laaa ikraaha fid deeni qat tabiyanar rushdu minal ghayy; famai yakfur bit Taaghooti wa yu'mim billaahi faqadis tamsaka bil'urwatil wusqaa lan fisaama lahaa; wallaahu Samee'un 'Aleem

“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.”

Quran 2:256 (Yusuf Ali Translation)