Observing and reflecting: these verses call for both, inviting people to travel through the earth and consider the end of the disbelievers and the corrupters. They turn the gaze to the realm of the heavens and the earth, to the rain that revives the land, to the blessings of night and day and to ships sailing on the sea, and they also invite reflection on the Quran.
Verses gathered from a topical index of the Quran, in Mushaf order; every verse is quoted in full.
Say, "Have you considered: if Allāh should make for you the night continuous until the Day of Resurrection, what deity other than Allāh could bring you light? Then will you not hear?"
Say, "Have you considered: if Allāh should make for you the day continuous until the Day of Resurrection, what deity other than Allāh could bring you a night in which you may rest? Then will you not see?"