The Holy Quran 70:8 — Surah Al-Ma'arij
Arabic text
يَوْمَ تَكُونُ ٱلسَّمَآءُ كَٱلْمُهْلِ
Translation
(The Day of Qiyaamah will be) The day when the sky will become (black) like the dirty residue of oil ... (or moulted copper)
Tafsir (excerpt) — Tafsir Usmani
The various states of the Day of Resurrection: some have translated the word “muhl” (الْمُهْلِ) as “the dregs of oil”.
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