
Augustine of Hippo
Catena Aurea · Matthäusevangelium 19
And I say unto you, Whosoever shall put away his wife, except it be for fornication, and shall marry another, committeth adultery: and whoso marrieth her which is put away doth commit adultery.
(De Conjug. Adult. ii. 9.) For a reunion of the wedlock, even after actual commission of adultery, is neither shameful nor difficult, where there is an undoubted remission of sin through the keys of the kingdom of heaven; not that after being divorced from her husband an adulteress should be called back again, but that after her union with Christ she should no longer be called an adulteress.