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 because the wife is made of the man, and both one of one flesh, a man shall leave his father and his mother, then there should be yet greater affection between brothers and sisters, for these come of the same parents, but man and wife of different. But this is saying too much, because the ordinance of God is of more force than the law of nature. For God’s precepts are not subject to the law of nature, but nature bends to the precepts of God. Also brethren are born of one, that they should seek out different roads; but the man and the wife are born of different persons, that they should coalesce in one. The order of nature also follows the appointment of God. For as is the sap in trees, so is affection in man. The sap ascends from the roots into the leaves, and passes forth into the seed. Therefore parents love their children, but are not so loved of them, for the desire of a man is not towards his parents, but towards the sons whom he has begot; and this is what is said, Therefore shall a man leave his father and his mother, and shall cleave unto his wife.