Surah At-Tur 52:44

وَإِن يَرَوْا۟ كِسْفًا مِّنَ ٱلسَّمَآءِ سَاقِطًا يَقُولُوا۟ سَحَابٌ مَّرْكُومٌ

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

Translation: Saheeh International

Tafsir

And if they were to see a fragment a portion of the heaven falling on them — as they say Then make fragments of the heaven fall upon us Q. 26187 as a chastisement for them — they would say this is ‘A heap of clouds!’ piled on top of one another that will bring us water; and so they do not believe.

Excerpt from Tafsir al-Jalalayn, commentary on 52:44, via Quran.com. The reader has the full commentary and 9 more tafsirs.