Matthew 9:14

Then came unto him disciples of John, saying, Why do we and the Pharisees keep many fasts, but thy disciples fast not?

Matthew 11:2

Then John, having heard in prison the works of Christ, sent two of his disciples,

John 3:25

Then a dispute arose between the disciples of John and the Jews with regard to purification.

John 4:1

AS soon then as the Lord knew that the Pharisees had heard that Jesus made and baptised more disciples than John

John 4:1

AS soon then as the Lord knew that the Pharisees had heard that Jesus made and baptised more disciples than John

Matthew 6:16

And when ye fast, be not as the hypocrites, affecting a gloomy look: for they disfigure their visages, that they may make a shew of fasting to men. Verily I say unto you, That they have their reward.

Matthew 11:18-19

For John came neither eating nor drinking, and they say, He hath a devil:

Mark 2:18-22

And the disciples of John and of the Pharisees kept fasts; and they came and said to him, Wherefore do the disciples of John, and of the Pharisees, fast? but thy disciples keep no fast.

Luke 5:33-39

Then said they unto him, Why do the disciples of John observe frequent fasts, and make prayers; but thine are eating and drinking?

Luke 18:9-12

Then he spake also this parable to certain persons, who had confidence in themselves, that they were righteous, and despised others:

Treasury of Scripture Knowledge

Summary

Then came to him the disciples of John, saying, Why do we and the Pharisees fast oft, but thy disciples fast not?

Bible References

Why

Matthew 6:16
And when ye fast, be not as the hypocrites, affecting a gloomy look: for they disfigure their visages, that they may make a shew of fasting to men. Verily I say unto you, That they have their reward.
Matthew 11:18
For John came neither eating nor drinking, and they say, He hath a devil:
Mark 2:18
And the disciples of John and of the Pharisees kept fasts; and they came and said to him, Wherefore do the disciples of John, and of the Pharisees, fast? but thy disciples keep no fast.
Luke 5:33
Then said they unto him, Why do the disciples of John observe frequent fasts, and make prayers; but thine are eating and drinking?
Luke 18:9
Then he spake also this parable to certain persons, who had confidence in themselves, that they were righteous, and despised others: