6يولِجُ اللَّيلَ فِي النَّهارِ وَيولِجُ النَّهارَ فِي اللَّيلِ ۚ وَهُوَ عَليمٌ بِذاتِ الصُّدورِ(Irfan-ul-Quran)He is the One Who makes the night pass into the day and the day pass into the night. And He is also Well Aware of the (hidden) contents of the hearts.