“The Synaxis of the Chief of the Heavenly Hosts, Archangel Michael and the Other Heavenly Bodiless Powers: Archangels Gabriel, Raphael, Uriel, Selaphiel, Jehudiel, Barachiel, and Jeremiel was established at the beginning of the fourth century at the Council of Laodicea, which met several years before the First Ecumenical Council. The 35th Canon of the Council of Laodicea condemned and denounced as heretical the worship of angels as gods and rulers of the world, but affirmed their proper veneration.” oca

In icons, the ribbons extending from the ears of angels
symbolize that they are always attending to God
and ready to obey.