Quran 57, Al-Hadid (Iron) ⓘ
This chapter (sura) of the Quran is thought to be written in the Medinan period sometime between 622 and 632 and is made up of 29 verses or 'aya'.
57:6 He causes the night to enter the day and causes the day to enter the night, and he is Knowing of that within the breasts.
يُولِجُ اللَّيْلَ فِي النَّهَارِ وَيُولِجُ النَّهَارَ فِي اللَّيْلِ وَهُوَ عَلِيمٌ بِذَاتِ الصُّدُورِ