Al-Qasas 28:73

Wamin rahmatihi jaAAala lakumuallayla wannahara litaskunoo feehi walitabtaghoomin fadlihi walaAAallakum tashkuroon

And out of His mercy He made for you the night and the day that you may rest therein and [by day] seek from His bounty and [that] perhaps you will be grateful.

And it is out of His mercy that He has made day and night for you, so that you may have rest in it, and so that you may search for His grace, and so that you may be grateful.