Saint John Damascene is one of the strongest witnesses from the days of the Church Fathers to the doctrine of the Dormition and bodily Assumption of the Blessed Virgin Mary at the end of her earthly life. This homily is cited by Pope Pius XII in his definition of the Assumption as a Dogma of faith:
Even though, according to nature, your most holy and happy soul is separated from your most blessed and stainless body and the body as usual is delivered to the tomb, it will not remain in the power of death and is not subject to decay just as her virginity remained inviolate while giving birth, when she departed her body was preserved from destruction and only taken to a better and more divine tabernacle, which is not subject to any death … Hence I will call her holy passing not death, but falling asleep [dormition] or departure, or better still, arrival. …
Your stainless and wholly immaculate body has not been left on earth; the Queen, the Mistress, the Mother of God who has truly given birth to God has been translated to the royal palaces of heaven. …
Angels and archangels have borne you upwards, the impure spirits of the air have trembled at your ascension. The air is purified, the ether sanctified by your passing through them… the powers meet you with sacred hymns and much solemnity, saying something like this: Who is she that comes forth as the morning rising, fair as the moon, elect like the sun? (cf. Song of Songs 6:9). How you have blossomed forth, how sweet you have become! You are the flower of the field, a lily among the thorns (Song of Songs 2.1) …
Not like Elijah have you entered Heaven, not like Paul have you been rapt to the third Heaven; no, you have penetrated even to the royal throne of your Son himself… a blessing for the world, a sanctification of the universe, refreshment for those who are tired, comfort for the sorrowing, healing for the sick, a port for those in danger, pardon for sinners, soothing balm for the oppressed, quick help for all who pray to you…
Good Mistress, graciously look down on us; direct and guide our destinies wheresoever you will. Pacify the storm of our wicked passions, guide us into the quiet port of the divine will and grant us the blessedness to come.