Say: Have you thought, if Allah made night everlasting for you till the Day of Resurrection, who is a god beside Allah who could bring you light? Will you not then hear?
Say: Have you thought, if Allah made day everlasting for you till the Day of Resurrection, who is a god beside Allah who could bring you night wherein you rest? Will you not then see?
Out of His mercy He has appointed for you night and day, that therein you may rest, and that you may seek His bounty, and that you may be thankful.
And on the Day when He shall call to them and say: Where are My partners whom you pretended?
And We shall take out from every nation a witness and We shall say: Bring your proof. Then they will know that Allah has the Truth, and all that they invented will have failed them.
-- The Quran 28:71-75