Quran 24:47 from Surah An-Noor on Divine Marvels.
وَيَقُولُونَ ءَامَنَّا بِٱللَّهِ وَبِٱلرَّسُولِ وَأَطَعۡنَا ثُمَّ يَتَوَلَّىٰ فَرِيقٞ مِّنۡهُم مِّنۢ بَعۡدِ ذَٰلِكَۚ وَمَآ أُوْلَٰٓئِكَ بِٱلۡمُؤۡمِنِينَ
English translation: And they say We believe in Allah and in the Messenger and we obey Then turns away a party of them after after that And not those (are) believers
Transliteration: wayaquluna amanna bil-lahi wabil-rasuli wa-ata'na thumma yatawalla fariqun min'hum min ba'di dhalika wama ulaika bil-mu'minina