They said unto him, Why did Moses then command to give a writing of divorcement, and to put her away?
All Commentaries on Matthew 19:7 Go To Matthew 19
John Chrysostom
AD 407
But if you put forward Moses, I tell you of Moses' Lord, and together with this, I rely upon the time also. For God at the beginning made them male and female; and this law is older (though it seem to have been now introduced by me), and with much earnestness established. For not merely did He bring the woman to the man, but also commanded to leave father and mother. And neither did He make it a law for him merely to come to the woman, but also to cleave to her, by the form of the language intimating that they might not be severed. And not even with this was He satisfied, but sought also for another greater union, for the two, He says, shall be one flesh.
Then after He had recited the ancient law, which was brought in both by deeds and by words, and shown it to be worthy of respect because of the giver, with authority after that He Himself too interprets and gives the law, saying, So that they are no more two, but one flesh. Like then as to sever flesh is a horrible thing, so also to divorce a wife is unlawful. And He stayed not at this, but brought in God also by saying, What therefore God has joined together, let not man put asunder, showing that the act was both against nature, and against law; against nature, because one flesh is dissevered; against law, because that when God has joined and commanded it not to be divided, you conspire to do this.
What then ought they to have done after this? Ought they not to have held their peace, and to have commended the saying? Ought they not to have marvelled at His wisdom? Ought they not to have stood amazed at His accordance with the Father? But none of these things do they, but as though they were contending for the law, they say, How then did Moses command to give a writing of divorcement, and to put her away? And yet they ought not now to have brought this forward, but rather He to them; but nevertheless He does not take advantage of them, nor does He say to them, I am not now bound by this, but He solves this too.
And indeed if He had been an alien from the old covenant, He would not have striven for Moses, neither would He have argued positively from the things done once for all at the beginning; He would not have studied to show that His own precepts agreed with those of old.
And indeed Moses had given many other commandments besides, both those about meats, and those about the Sabbath; wherefore then do they nowhere bring him forward, as here? From a wish to enlist the multitude of the husbands against him. For this was considered a thing indifferent with the Jews, and all used to do so much as this. Accordingly it was for this reason that when so many things had been said on the mount, they remembered this commandment only now.