For that to the imperfect the Law spoke imperfectly is plain from what he says to the hard hearts of the Jews, “If a man hate his wife, let him put her away,” (Deut. 24:1.) because since they were murderers and rejoiced in blood, they had no pity even upon those who were united to them, so that they slew their sons and daughters for devils. But now there is need of a more perfect doctrine. Wherefore I say, that if a man puts away his wife, having no excuse of fornication, he commits adultery, and he who marrieth another commits adultery.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).