Say: (oh prophet Mohammed ) "See ye? If Allah were to make the night perpetual over you to the Day of Judgement, what God is there other than Allah, who can give you light? Will ye not then hearken?"

Say: (O Prophet Muhammad ) "See ye? If Allah were to make the day perpetual over you to the Day of Judgement, what God is there other than Allah, who can give you a night in which ye can rest? Will ye not then see?"

It is out of His mercy that He has made for you night and day, that yea may rest therein, and that yea may seek of His grace, and in order that yea may be grateful.

(Al-Qasas:71-73)