Jerome
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.
Hence some think that a fast ought to follow the forty days of Passion, although the day of Pentecost and the coming of the Holy Spirit immediately bring back our joy and festival. From this text accordingly, Montanus, Prisca, and Maximilla enjoin a forty days’ abstinence after Pentecost, but it is the use of the Church to come to the Lord’s passion and resurrection through humiliation of the flesh, that by carnal abstinence we may better be prepared for spiritual fulness.