Surah Al-Waqi'ah, ayah 47

وَكَانُواْ يَقُولُونَ أَئِذَا مِتۡنَا وَكُنَّا تُرَابٗا وَعِظَٰمًا أَءِنَّا لَمَبۡعُوثُونَ ٤٧

Wakānū yaqūlūna a'idhā mitnā wakunnā turāban wa'izāman a'innā lamab'ūthūn

And they used to say, "When we die and become dust and bones, are we indeed to be resurrected?