Surah At-Tur, ayah 44

وَإِن يَرَوۡاْ كِسۡفٗا مِّنَ ٱلسَّمَآءِ سَاقِطٗا يَقُولُواْ سَحَابٞ مَّرۡكُومٞ ٤٤

Wa in yaraw kisfam minas-samā'i sāqitan yaqūlū sahābum markūm

And if they were to see a fragment from the sky falling,¹⁵⁵⁹ they would say, "[It is merely] clouds heaped up."