6إِنَّ فِي اختِلافِ اللَّيلِ وَالنَّهارِ وَما خَلَقَ اللَّهُ فِي السَّماواتِ وَالأَرضِ لَآياتٍ لِقَومٍ يَتَّقونَN. J. DawoodIn the alternation of night and day, and in all that God has created in the heavens and the earth, there are signs for righteous men.