﴿ بِسْمِ ٱللَّهِ ٱلرَّحْمَٰنِ ٱلرَّحِيمِ وَٱلْمُرْسَلَٰتِ عُرْفًۭا ﴾

“CONSIDER these [messages,] sent forth in waves”

By those sent in succession ‘urfan that is by the winds that follow one another in succession like the mane ‘urf of a horse one part of hair coming after the other ‘urfan is in the accusative because it is a circumstantial qualifier;