My soul doth magnify the Lord. And my spirit hath rejoiced in God my Saviour.
Because he hath regarded the humility of his handmaid;
for behold from henceforth all generations shall call me blessed.
"By the authority of our Lord Jesus Christ, of the Blessed Apostles Peter and Paul, and by our own authority, we pronounce, declare, and define it to be a divinely revealed dogma: that the Immaculate Mother of God, the ever Virgin Mary, having completed the course of her earthly life, was assumed body and soul into heavenly glory."
Apostolic Constitution of Pope Pius XII issued November 1, 1950