(Al-Ma’aarij) 70 : 8
يَوْمَ تَكُونُ السَّمَاءُ كَالْمُهْلِ
On that Day the sky will become just like molten brass.
As explained in verses 67: 3; and 50: 3, today if the sky is existing without having any gap or whole, on the Dooms Day it will become like molten metal. On that Day it will become just like rose colored ointment as told in verse 55: 37. See explanation 69: 16; and 78: 19.