39:5
خَلَقَ ٱل سَّمَٰوَٰتِ وَ ٱلْ أَرْضَ بِ ٱلْ حَقِّ يُكَوِّرُ ٱلَّ يْلَ عَلَى ٱل نَّهَارِ وَ يُكَوِّرُ ٱل نَّهَارَ عَلَى ٱلَّ يْلِ وَ سَخَّرَ ٱل شَّمْسَ وَ ٱلْ قَمَرَ كُلٌّ يَجْرِى لِ أَجَلٍ مُّسَمًّى أَلَا هُوَ ٱلْ عَزِيزُ ٱلْ غَفَّٰرُ
He created the heavens and earth in truth. He wraps the night over the day and wraps the day over the night and has subjected the sun and the moon, each running [its course] for a specified term. Unquestionably, He is the Exalted in Might, the Perpetual Forgiver.
81:1
إِذَا ٱل شَّمْسُ كُوِّرَتْ
When the sun is wrapped up [in darkness]