Surah Al-Ma'arij, ayah 8

يَوۡمَ تَكُونُ ٱلسَّمَآءُ كَٱلۡمُهۡلِ ٨

Yawma takūnus-samā'u kal-muhl

On the Day the sky will be like murky oil,¹⁷⁴⁹