يُولِجُ ٱلَّيْلَ فِى ٱلنَّهَارِ وَيُولِجُ ٱلنَّهَارَ فِى ٱلَّيْلِ ۚ وَهُوَ عَلِيمٌۢ بِذَاتِ ٱلصُّدُورِ
yūliju al-layla fī l-nahāri wayūliju l-nahāra fī al-layli wahuwa ʿalīmun bidhāti l-ṣudūri
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.
— Saheeh International
He makes night merge into day and day into night. He knows what is in every heart.
— M. A. S. Abdel Haleem
He merges night into day (i.e. the decrease in the hours of the night is added into the hours of the day), and merges day into night (i.e. the decrease in the hours of the day is added into the hours of the night), and He has full knowledge of whatsoever is in the breasts.
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali