(Al Hadeed) 57 : 6
يُولِجُ اللَّيْلَ فِي النَّهَارِ وَيُولِجُ النَّهَارَ فِي اللَّيْلِ ۚ وَهُوَ عَلِيمٌ بِذَاتِ الصُّدُورِ
He causes the night to embed in the day and He causes the day to embed in the night; and He knows the status of the chests.
See explanation 3: 26-27; and 39: 5-6.