Hmmm no angels exist.......... except in the minds of some religious folk, this belief stemming from past ages when just about everyone was ignorant, and superstitious. Song is good , though, angels or no angels.
Archangel Gabriel supposedly spoke to Mohammed. I think that it was really Lucifer, deceiving him into thinking that he was hearing the word of God. It was an excellent devilish trick to set up a 'new' religion, similar to both Judaism and christianity, knowing full well that this would cause all manner of arguments , nastiness violence, wars etc over time. And it did. Because religion kills.