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.

And by the night when it withdraws,

And by the night as it departs;

And by the night when it departs.

By the night as it envelops;