7:1-13 One great design of Christ's coming was, to set aside the ceremonial law; and to make way for this, he rejects the ceremonies men added to the law of God's making. Those clean hands and that pure heart which Christ bestows on his disciples, and requires of them, are very different from the outward and superstitious forms of Pharisees of every age. Jesus reproves them for rejecting the commandment of God. It is clear that it is the duty of children, if their parents are poor, to relieve them as far as they are able; and if children deserve to die that curse their parents, much more those that starve them. But if a man conformed to the traditions of the Pharisees, they found a device to free him from the claim of this duty.And ye suffer him no more to do ought for his father, or his mother. According to the Jewish canons (w), if a man vowed a thing which is contrary to a command, he was obliged to keep his vow, and break the command: thus, if a man vowed that his father or his mother should never receive any benefit from what he had, but that his substance was as "Corban", or as any thing devoted to divine service, he was obliged to keep his vow; nor was he allowed after this to do any thing for his father, or mother, however poor or helpless they might be; unless he applied to a wise man to revoke his vow, or to give him liberty to do it; for he could not do it of himself, as wicked as it was; and though he might heartily repent of it, and was ever so willing to make it null and void: and though a dissolution it by a wise man was allowed of, yet hereby they set up their own power and authority against God, and his law; they did not rescind the vow, because it was contrary to the command of God: for notwithstanding its being contrary to the command of God, it was to be observed, though to the breaking of that, unless loosed by a wise man, at the man's request; whereby they established their magisterial power and authority, without any regard to the honour and glory of God; and therefore what follows, is justly observed by our Lord; See Gill on Matthew 15:5.

(w) Maimon. Hilch. Nedarim, c. 3. sect. 1.