Pseudo-Chrysostom
Catena Aurea · Matthäusevangelium 19
And it came to pass, that when Jesus had finished these sayings, he departed from Galilee, and came into the coasts of Judæa beyond Jordan; And great multitudes followed him; and he healed them there. The Pharisees also came unto him, tempting him, and saying unto him, Is it lawful for a man to put away his wife for every cause? And he answered and said unto them, Have ye not read, that he which made them at the beginning made them male and female, And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh? Wherefore they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder. They say unto him, Why did Moses then command to give a writing of divorcement, and to put her away? He said unto them, Moses because of the hardness of your hearts suffered you to put away your wives: but from the beginning it was not so.
If then God created the male and female out of one, to this end that they should be one, why then henceforth were not they born man and wife at one birth, as it is with certain insects? Because God created male and female for the continuance of the species, yet is He ever a lover of chastity, and promoter of continence. Therefore did He not follow this pattern in all kinds, to the end that, if any man choose to marry, he may know what is, according to the first disposition of the creation, the condition of man and wife; but if he choose not to marry, he shall not be under necessity to marry by the circumstances of his birth, lest he should by his continence be the destruction of the other who was not willing to be continent; for which same cause God forbids that after being joined in wedlock one should separate if the other be unwilling.