Surah Al-An'am — Ayah 111 (6:111)
۞ وَلَوۡ أَنَّنَا نَزَّلۡنَآ إِلَيۡهِمُ ٱلۡمَلَٰٓئِكَةَ وَكَلَّمَهُمُ ٱلۡمَوۡتَىٰ وَحَشَرۡنَا عَلَيۡهِمۡ كُلَّ شَيۡءٖ قُبُلٗا مَّا كَانُواْ لِيُؤۡمِنُوٓاْ إِلَّآ أَن يَشَآءَ ٱللَّهُ وَلَٰكِنَّ أَكۡثَرَهُمۡ يَجۡهَلُونَ ١١١
English translation (Saheeh International)
And even if We had sent down to them the angels [with the message] and the dead spoke to them [of it] and We gathered together every [created] thing in front of them, they would not believe unless Allāh should will. But most of them, [of that], are ignorant.
Brief commentary
If I had responded to them by bringing what they requested – by sending down the angels for them to see, and made the dead speak to them about the truth of what you brought, and gathered everything they asked for before their eyes – they still would not have believed in what you brought, unless Allah willed for them to be guided. However, most of them are ignorant of this and do not turn to Allah to grant them guidance.