Surah An-Najm 53:54

فَغَشَّىٰهَا مَا غَشَّىٰ

And covered them by that which He covered.

Translation: Saheeh International

Tafsir

so that there covered them of rocks afterwards that which covered them this is purposely left vague in order to inspire terror; in sūrat Hūd it is stated We made their uppermost the nethermost and We rained upon them stones of baked clay Q. 1182.

Excerpt from Tafsir al-Jalalayn, commentary on 53:54, via Quran.com. The reader has the full commentary and 9 more tafsirs.