Quran 5:111 from Surah Al-Maaida on Divine Marvels.
وَإِذۡ أَوۡحَيۡتُ إِلَى ٱلۡحَوَارِيِّـۧنَ أَنۡ ءَامِنُواْ بِي وَبِرَسُولِي قَالُوٓاْ ءَامَنَّا وَٱشۡهَدۡ بِأَنَّنَا مُسۡلِمُونَ
English translation: And when I inspired to the disciples to believe in Me and in My Messenger they said We believe and bear witness that indeed we (are) Muslims
Transliteration: wa-idh awhaytu ila al-hawariyina an aminu bi wabirasuli qalu amanna wa-ish'had bi-annana mus'limuna