Quran 16:106 from Surah An-Nahl on Divine Marvels.
مَن كَفَرَ بِٱللَّهِ مِنۢ بَعۡدِ إِيمَٰنِهِۦٓ إِلَّا مَنۡ أُكۡرِهَ وَقَلۡبُهُۥ مُطۡمَئِنُّۢ بِٱلۡإِيمَٰنِ وَلَٰكِن مَّن شَرَحَ بِٱلۡكُفۡرِ صَدۡرٗا فَعَلَيۡهِمۡ غَضَبٞ مِّنَ ٱللَّهِ وَلَهُمۡ عَذَابٌ عَظِيمٞ
English translation: Whoever disbelieves in Allah after after his belief except (one) who is forced while his heart (is) content with the faith But (one) who opens to disbelief (his) breast then upon them (is) a wrath of Allah and for them (is) a punishment great
Transliteration: man kafara bil-lahi min ba'di imanihi illa man uk'riha waqalbuhu mut'ma-innun bil-imani walakin man sharaha bil-kuf'ri sadran fa'alayhim ghadabun mina al-lahi walahum adhabun azimun