Translation of the verse 6 from Surah Al-hadid : Number of verses 29 - - page 538 - Part 27.
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.
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.
(57:6) He causes the night to pass into the day, and causes the day to pass into the night, and He fully knows all that is hidden in the breasts of people.