I have never, ever, ever heard this at Mass. When in the liturgy is this mentioned?
I’ll have to check my Daily Roman Missal later to see if there is anything on the solemnity of the Assumption that mentions the Dormition of the Holy Theotokos. If there is than the reason you don’t remember hearing it is because it would be heard only once a year during Mass.
However, there is more to liturgy than the Mass alone. In the Saturday vespers from the
Little Office of the Blessed Virgin Mary the second reading is from “a homily on the falling asleep [dormition] of the Blessed Virgin Mary by Saint Germanus of Constantinople.” St. Germanus says and we pray:
"Indeed you left our earth to prove that the mystery of the awe-inspiring incarnation was really fulfilled. The fact that you waited for the
natural end of human life would convince the world that the God who was born of you came into being also as perfect man, the Son of a true Mother, who was subject to the
laws and constraints of nature, by divine decree and the requirement of an earthly lifetime. As one who possessed a human body you
could not escape death, the common fate of humanity.
Thus even your Son, though God of all things, even he, through sharing, so to speak, the mortality of all our race,
tasted a similiar bodily
death. It was clearly in the same way as he made his own life-giving tomb that he made your sepulcher wonderful also, as the
tomb of your falling asleep, a tomb which received life; therefore both tombs really received your bodies, but could in no way affect them with corruption. For nor could you, as the vessel which contained God, waste away to dust in the destruction of death…
In this way, then, you suffered the
death of finite beings and the translation to the immortal way of life of eternal beings where God dwells…" (The bold is my emphasis and the italics are the emphasis in the text).
An alternate reading for that day is from "the apostolic constitution
Munificentissimus Deus by Pope Pius XII. He says and we pray:
“Thus, she gained at last the supreme crown of her privileges - to be preserved immune from the
corruption of the tomb, and, like her Son, when death had been conquered, to be carred up body and soul to the exalted glory of heaven…”
Some, however, may thing that the “Little Office” is too obscure. The second reading from the “Office of Readings” for the solemnity of the Assumption in the
Liturgy of the Hours is also from Pope Pius XII’s
Munificentissimus Deus. For brevity’s sake (this is already very long) I will not quote in whole. :extrahappy:
He says, “what is commemorated in this feast is not simply the total absence of corruption from the
dead body of the Blessed Virgin Mary but also her triumph over death and her glorification in heaven…”
He quotes St. John Damascene saying, “It was necessary that she who had preserved her virginity inviolate in childbirth should also have her body kept free from all corruption
after death.”
He quotes “another early author” saying, “she is enlivened by him to share an eternal incorruptibility of body with him who
raised her from the tomb and took her up to himself…”
Okay, there it is; first the Catechism and now the liturgy.
In Christ through Mary