6 Preface إِنَّ فِي اختِلافِ اللَّيلِ وَالنَّهارِ وَما خَلَقَ اللَّهُ فِي السَّماواتِ وَالأَرضِ لَآياتٍ لِقَومٍ يَتَّقونَAhmed AliIn the alternation of night and day, and all that He has created in the heavens and the earth, are certainly signs for people who fear God.