أَلَمْ يَرَوْا أَنَّا جَعَلْنَا اللَّيْلَ لِيَسْكُنُوا فِيهِ وَالنَّهَارَ مُبْصِرًا إِنَّ فِي ذَلِكَ لَآيَاتٍ لِّقَوْمٍ يُؤْمِنُونَ
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سورة النمل
(27/86) Did they not see that We have made the night (dark) that they may rest therein, and the day (bright)? Most surely there are Signs (proofs) in this for a people who believe.
Surah An-Naml