Surah Fatir 35:13
يُولِجُ ٱلَّيْلَ فِى ٱلنَّهَارِ وَيُولِجُ ٱلنَّهَارَ فِى ٱلَّيْلِ وَسَخَّرَ ٱلشَّمْسَ وَٱلْقَمَرَ كُلٌّ يَجْرِى لِأَجَلٍ مُّسَمًّى ۚ ذَٰلِكُمُ ٱللَّهُ رَبُّكُمْ لَهُ ٱلْمُلْكُ ۚ وَٱلَّذِينَ تَدْعُونَ مِن دُونِهِۦ مَا يَمْلِكُونَ مِن قِطْمِيرٍ
He causes the night to enter the day, and He causes the day to enter the night and has subjected the sun and the moon - each running [its course] for a specified term. That is Allāh, your Lord; to Him belongs sovereignty. And those whom you invoke other than Him do not possess [as much as] the membrane of a date seed.
Translation: Saheeh International
Tafsir
He God makes the night pass enter into the day so that it becomes longer and He makes the day pass into the night so that it becomes longer and He has disposed the sun and the moon each of them moving in its course to an appointed term — to the Day of Resurrection. That is God your Lord; …
Excerpt from Tafsir al-Jalalayn, commentary on 35:13, via Quran.com. The reader has the full commentary and 9 more tafsirs.