The first sentence of this verse should be rendered thus: And the disciples of John and the Pharisees were fasting ( ἧσαν νηστεύοντες). In all the synoptic Gospels we find this incident following closely upon what goes before.
It is not improbable that the Pharisees and the disciples of John were fasting at the very time when Matthew gave his feast. This was not one of the fasts prescribed by the Law; had it been so, it would have been observed by our Lord.
There were, however, fasts observed by the Pharisees which were not required by the Law; there were two in particular of a voluntary nature, mentioned by the Pharisee (Luke 18:12), where he says, "I fast twice in the week."
It was a custom, observed by the stricter Pharisees, but not of legal obligation. It was not correct to say, but thy disciples fast not. They fasted, no doubt, but in a different spirit; they did not fast to be seen of men—they followed the higher teaching of their Master.
It is remarkable to find the disciples of John here associated with the Pharisees. John was now in prison in the fort of Machaerus. It is possible that jealousy of the increasing influence of Christ may have led John's disciples to associate themselves with the Pharisees.
The point of this particular attack upon Christ was this: It is as though they said, "You claim to be a new teacher sent from God, a teacher of a more perfect religion. How is it, then, that we are fasting, while your disciples are eating and drinking?"
The disciples of John more especially may have urged this out of zeal for their master. Such an unworthy zeal is too often seen in good men, who love to prefer their own leader to all others, forgetting the remonstrance of St.
Paul, "While there is amongst you strife and contention, are ye not carnal, and walk after the manner of men?"