Surah Al Furqan Tafseer

وَهُوَ الَّذِي جَعَلَ لَكُمُ اللَّيْلَ لِبَاسًا

And it is He Who makes the night a covering for you,

It covers and conceals all things.

This is like the Ayah:

وَالَّيْلِ إِذَا يَغْشَى

By the night as it envelops. (92:1)

وَالنَّوْمَ سُبَاتًا

and the sleep a repose,

means, a halt to movement so that bodies may rest. For the faculties and limbs get tired from their constant movement during the day when one goes out to earn a living. When night comes, and it becomes quiet, they stop moving, and rest; so sleep provides a rejuvenation for both the body and the soul.

وَجَعَلَ النَّهَارَ نُشُورًا

and makes the day Nushur.

meaning, people get up and go out to earn a living and attend to their business.

This is like the Ayah:

وَمِن رَّحْمَتِهِ جَعَلَ لَكُمُ الَّيْلَ وَالنَّهَارَ لِتَسْكُنُواْ فِيهِ وَلِتَبتَغُواْ مِن فَضْلِهِ

It is out of His mercy that He has made for you the night and the day that you may rest therein and that you may seek of His bounty... (28:73