Surah Al-Ma'arij (The Pathways of Heavenly Ascent), Verse 8

یَوْمَ تَكُوْنُ السَّمَآءُ كَالْمُهْلِ ۟

Yawma takoonus samaaa'u kalmuhl

“The Day that the sky will be like molten brass,”

Quran 70:8 (Yusuf Ali Translation)