The Infallible Teaching of the Church

“If anyone does not properly and truly confess in accord with the holy Fathers, that the holy Mother of God and ever virgin and immaculate Mary in the earliest of the ages conceived of the Holy Spirit without seed, namely, God the Word Himself specifically and truly, who was born of God the Father before all ages, and that she incorruptibly bore [Him],  her virginity remaining indestructible even after His birth, let him be condemned.”  -Pope Saint Martin I, The Lateran Council, Canon 3, 649AD (DS 256)