يُولِجُ اللَّيْلَ فِي النَّهَارِ وَيُولِجُ النَّهَارَ فِي اللَّيْلِ وَسَخَّرَ الشَّمْسَ وَالْقَمَرَ كُلٌّ يَجْرِي لِأَجَلٍ مُّسَمًّى ۚ ذَٰلِكُمُ اللَّهُ رَبُّكُمْ لَهُ الْمُلْكُ ۚ وَالَّذِينَ تَدْعُونَ مِن دُونِهِ مَا يَمْلِكُونَ مِن قِطْمِيرٍ (13)
(35:13) He causes the night to phase into the day and the day into the night, *30 and He has subjected the sun and the moon, each running its course to an appointed term. *31 That is Allah, your Lord; to Him belongs the Kingdom; but those whom you call upon, apart from Allah, possess not so much as the skin of a date-stone. *32
*30) That is, "The light of the day starts diminishing and the darkness of the night increasing gradually so as to cover up everything completely. Likewise, towards the end of the night, in the beginning, a streak of the light appears on the horizon, and then the bright day dawns."
*31) "Subjected .." : subjected to a law.
*32) The word qitmira in the original means the thin skin that covers the stone of the date-fruit; but what is meant to be said is that the gods of the mushriks do not own anything whatever. That is why we have translated it "a blade of grass", which is an insignificant thing.