John Chrysostom
For since they unjustly accused the disciples not of transgressing the law, but the commands of the elders, He sharply confounds them, calling them hypocrites, as looking with reverence upon what was not worthy of it. He adds, however, the words of Isaiah the prophet, as spoken of them; as though He would say, As those men, of whom it is said, that they honour God with their lips, whilst their heart is far from him, in vain pretend to observe the dictates of piety, whilst they honour the doctrines of men, so ye also neglect your soul, of which ye should take care, and blame those who live justly.
Moreover, to convict them of neglecting the reverence due to God, for the sake of the tradition of the elders, which was opposed to the Holy Scriptures, He subjoins, For Moses said, Honour thy father and thy mother; and, Whoso curseth father or mother, let him die the death. (Exod. 21:17.)
Notwithstanding the existence of such a divine law, and the1 threats against such as break it, ye lightly transgress the commandment of God, observing the traditions of the Elders. Wherefore there follows, But ye say, If a man shall say to his father or mother, It is Corban, that is to say, a gift, by whatsoever thou mightest be profited by me; understand, he will be freed from the observation of the foregoing command. Wherefore it continues, And ye suffer him no more to do ought for his father or his mother.
Or else it may be said, that the Pharisees taught young persons, that if a man offered a gift in expiation of the injury done to his father or mother, he was free from sin, as having given to God the gifts which are owed to a parent; and in saying this, they did not allow parents to be honoured.