The very first verse (35:1) of this Sura says that Allah has appointed angels as messengers (that is, as couriers) of His dicta.
Ugu uun lagu jiro kuwii sanadaha hore ka dib markii uu socdaalka ku Gabriel Angel la diray by Eebe in Nabiga (Salla Allahu alihi wa Sallam) si uu u dhameystiro maamuleyaasha aaminsan Islaamka.