Quran 52:44 from Surah At-Tur on Divine Marvels.
وَإِن يَرَوۡاْ كِسۡفٗا مِّنَ ٱلسَّمَآءِ سَاقِطٗا يَقُولُواْ سَحَابٞ مَّرۡكُومٞ
English translation: And if they were to see a portion from the sky falling they will say Clouds heaped up
Transliteration: wa-in yaraw kis'fan mina al-samai saqitan yaqulu sahabun markumun