" But I marvel, if, as it is allowed to put away a wife who is an adulteress, so it be allowed, having put her away, to marry another. For holy Scripture causes a hard knot in this matter, in that the Apostle says, that, by commandment of the Lord, the wife ought not to depart from her husband, but, in case she shall have departed, to remain unmarried, or to be reconciled to her husband; [1950] whereas surely she ought not to depart and remain unmarried, save from an husband that is an adulterer, lest by withdrawing from him, who is not an adulterer, she cause him to commit adultery. "

― Augustine of Hippo , The Complete Works of Saint Augustine: The Confessions, On Grace and Free Will, The City of God, On Christian Doctrine, Expositions on the Book Of Psalms, ... (50 Books With Active Table of Contents)