Quran 42:24 from Surah Ash-Shura on Divine Marvels.
أَمۡ يَقُولُونَ ٱفۡتَرَىٰ عَلَى ٱللَّهِ كَذِبٗاۖ فَإِن يَشَإِ ٱللَّهُ يَخۡتِمۡ عَلَىٰ قَلۡبِكَۗ وَيَمۡحُ ٱللَّهُ ٱلۡبَٰطِلَ وَيُحِقُّ ٱلۡحَقَّ بِكَلِمَٰتِهِۦٓۚ إِنَّهُۥ عَلِيمُۢ بِذَاتِ ٱلصُّدُورِ
English translation: Or (do) they say He has invented about Allah a lie But if Allah (had) willed Allah (had) willed He would seal [over] your heart And Allah eliminates And Allah eliminates the falsehood and establishes the truth by His Words Indeed, He (is) All-Knowing of what (is in) the breasts
Transliteration: am yaquluna if'tara ala al-lahi kadhiban fa-in yasha-i al-lahu yakhtim ala qalbika wayamhu al-lahu al-batila wayuhiqqu al-haqa bikalimatihi innahu alimun bidhati al-suduri