Quran 31:23 from Surah Luqman on Divine Marvels.
وَمَن كَفَرَ فَلَا يَحۡزُنكَ كُفۡرُهُۥٓۚ إِلَيۡنَا مَرۡجِعُهُمۡ فَنُنَبِّئُهُم بِمَا عَمِلُوٓاْۚ إِنَّ ٱللَّهَ عَلِيمُۢ بِذَاتِ ٱلصُّدُورِ
English translation: And whoever disbelieves let not grieve you his disbelief To Us (is) their return then We will inform them of what they did Indeed Allah (is) the All-Knower of what (is in) the breasts
Transliteration: waman kafara fala yahzunka kuf'ruhu ilayna marji'uhum fanunabbi-uhum bima amilu inna al-laha alimun bidhati al-suduri