يُولِجُ ٱلَّيۡلَ فِي ٱلنَّهَارِ وَيُولِجُ ٱلنَّهَارَ فِي ٱلَّيۡلِۚ وَهُوَ عَلِيمُۢ بِذَاتِ ٱلصُّدُورِ ٦
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.
Translation: Saheeh International (English)
Each word's meaning and sound
He enters the night into the day and so the darkness arrives and people sleep; He enters the day into the night and so the light arrives and people go about their business. He is aware of everything that the hearts of His servants contain; none of it is hidden from Him.
Al-Mukhtasar in interpreting the Noble Quran