Surah Al-Isra' (The Night Journey), Verse 94

وَمَا مَنَعَ النَّاسَ اَنْ یُّؤْمِنُوْۤا اِذْ جَآءَهُمُ الْهُدٰۤی اِلَّاۤ اَنْ قَالُوْۤا اَبَعَثَ اللّٰهُ بَشَرًا رَّسُوْلًا ۟

Wa maa mana'an naasa any yu'minooo iz jaaa'ahumul hudaaa illaaa an qaalooo aba'asal laahu basharar Rasoolaa

“What kept men back from belief when Guidance came to them, was nothing but this: they said, "Has Allah sent a man (like us) to be (His) Messenger?"”

Quran 17:94 (Yusuf Ali Translation)