Quran 6:37 from Surah Al-An'aam on Divine Marvels.
وَقَالُواْ لَوۡلَا نُزِّلَ عَلَيۡهِ ءَايَةٞ مِّن رَّبِّهِۦۚ قُلۡ إِنَّ ٱللَّهَ قَادِرٌ عَلَىٰٓ أَن يُنَزِّلَ ءَايَةٗ وَلَٰكِنَّ أَكۡثَرَهُمۡ لَا يَعۡلَمُونَ
English translation: And they said Why (is) not sent down to him a Sign from his Lord Say Indeed Allah (is) Able [on] to send down a Sign but most of them (do) not know
Transliteration: waqalu lawla nuzzila alayhi ayatun min rabbihi qul inna al-laha qadirun ala an yunazzila ayatan walakinna aktharahum la ya'lamuna