Quran 38:8 from Surah Saad on Divine Marvels.
أَءُنزِلَ عَلَيۡهِ ٱلذِّكۡرُ مِنۢ بَيۡنِنَاۚ بَلۡ هُمۡ فِي شَكّٖ مِّن ذِكۡرِيۚ بَل لَّمَّا يَذُوقُواْ عَذَابِ
English translation: Has been revealed to him the Message from among us Nay They (are) in doubt about My Message Nay not they have tasted My punishment
Transliteration: a-unzila alayhi al-dhik'ru min baynina bal hum fi shakkin min dhik'ri bal lamma yadhuqu adhabi