
Augustine of Hippo
Catena Aurea · Matthäusevangelium 1
And Jacob begat Joseph the husband of Mary, of whom was born Jesus, who is called Christ.
(De Cons. Evang. ii. 1.) It was not lawful that he should think to separate himself from Mary for this, that she brought forth Christ as yet a Virgin. And herein may the faithful gather, that if they be married, and preserve strict continence on both sides, yet may their wedlock hold with union of love only, without carnal; for here they see that it is possible that a son be born without carnal embrace.