Saint Michael appearing one day to Antonia d' Astonac, a most devout Servant of God, told her that he wished to be honored by nine salutations corresponding to the nine Choirs of Angels, which should consist of one Our Father and three Hail Mary's in honor of each of the angelic choirs.

Promises of St. Michael

Whosoever would practice this devotion in his honor would have, when approaching the Holy Table, an escort of nine angels chosen from each one of the nine choirs. In addition, for the daily recital of these nine salutations he promised his continual assistance and that of all the holy angels during life, and after death deliverance from purgatory for themselves and their relations.