Tertullian

“ For he who marries a woman who is unlawfully put away is as much of an adulterer as the man who marries one who is un-divorced. Permanent is the marriage which is not rightly dissolved; to marry, [13] therefore, whilst matrimony is undissolved, is to commit adultery. Since, therefore, His prohibition of divorce was a conditional one, He did not prohibit absolutely ”

“ He also is deemed equally guilty of adultery, who marries a woman put away by her husband. The Creator, however, except on account of adultery, does not put asunder what He Himself joined together, the same Moses in another passage enacting that he who had married after violence to a damsel, should thenceforth not have it in his power to put away his wife. [25] Now, if a compulsory marriage contracted after violence shall be permanent, how much rather shall a voluntary one, the result of agreement! ”

“ His teaching is not contrary to Moses, whose precept He partially [16] defends, I will not [17] say confirms. If, however, you deny that divorce is in any way permitted by Christ, how is it that you on your side [18] destroy marriage, not uniting man and woman, nor admitting to the sacrament of baptism and of the eucharist those who have been united in marriage anywhere else, [19] unless they should agree together to repudiate the fruit of their marriage, and so the very Creator Himself? Well, then, what is a husband to do in your sect, [20] if his wife commit adultery? Shall he keep her? ”