Surah Ar-Rahman, ayah 37

فَإِذَا ٱنشَقَّتِ ٱلسَّمَآءُ فَكَانَتۡ وَرۡدَةٗ كَٱلدِّهَانِ ٣٧

Fa idhanshaqqatis-samā'u fakānat wardatan kad-dihān

And when the heaven is split open and becomes rose-colored like oil¹⁶⁰¹ -