Quran 2:256 from Surah Al-Baqara on Divine Marvels.
لَآ إِكۡرَاهَ فِي ٱلدِّينِۖ قَد تَّبَيَّنَ ٱلرُّشۡدُ مِنَ ٱلۡغَيِّۚ فَمَن يَكۡفُرۡ بِٱلطَّٰغُوتِ وَيُؤۡمِنۢ بِٱللَّهِ فَقَدِ ٱسۡتَمۡسَكَ بِٱلۡعُرۡوَةِ ٱلۡوُثۡقَىٰ لَا ٱنفِصَامَ لَهَاۗ وَٱللَّهُ سَمِيعٌ عَلِيمٌ
English translation: (There is) no compulsion in the religion Surely has become distinct the right (path) from the wrong Then whoever disbelieves in false deities and believes in Allah then surely he grasped the handhold [the] firm (which) not (will) break [for it] And Allah (is) All-Hearing All-Knowing
Transliteration: la ik'raha fi al-dini qad tabayyana al-rush'du mina al-ghayi faman yakfur bil-taghuti wayu'min bil-lahi faqadi is'tamsaka bil-'ur'wati al-wuth'qa la infisama laha wal-lahu sami'un alimun