Quran At-Tur 52:44
وَإِن يَرَوۡاْ كِسۡفٗا مِّنَ ٱلسَّمَآءِ سَاقِطٗا يَقُولُواْ سَحَابٞ مَّرۡكُومٞ ٤٤
Translation
And if they were to see a fragment from the sky falling, they would say, "[It is merely] clouds heaped up."
وَإِن يَرَوۡاْ كِسۡفٗا مِّنَ ٱلسَّمَآءِ سَاقِطٗا يَقُولُواْ سَحَابٞ مَّرۡكُومٞ ٤٤
And if they were to see a fragment from the sky falling, they would say, "[It is merely] clouds heaped up."