John Chrysostom
Catena Aurea · Matthäusevangelium 9
Then came to him the disciples of John, saying, Why do we and the Pharisees fast oft, but thy disciples fast not? And Jesus said unto them, Can the children of the bridechamber mourn, as long as the bridegroom is with them? but the days will come, when the bridegroom shall be taken from them, and then shall they fast. No man putteth a piece of new cloth unto an old garment, for that which is put in to fill it up taketh from the garment, and the rent is made worse. Neither do men put new wine into old bottles; else the bottles break, and the wine runneth out, and the bottles perish: but they put new wine into new bottles, and both are preserved.
What they say comes to this, Be it that you do this as Physician of souls, but why do your disciples neglect fasting and approach such tables? And to augment the weight of their charge by comparison, they put themselves first, and then the Pharisees. They fasted as they learnt out of the Law, as the Pharisee spoke, I fast twice in the week; (Luke 18:12.) the others learnt it of John.