And thus, as the human race fell into bondage to death by means of a virgin, so is it rescued by a virgin. (
Against Heresies, Book V, Chapter 19)
But Eve … having become disobedient, was made the cause of death, both to herself and to the entire human race; so also did Mary, … by yielding obedience, become the cause of salvation, both to herself and the whole human race. (
Against Heresies, Book III, Chapter 22)