Matthew 9:14

Then the disciples of John come to Him, saying, Wherefore do we and the Pharisee fast, but thy disciples do not fast?

Matthew 11:2

And John hearing in the prison the works of Christ, sending two of his disciples,

John 3:25

And there was a disputation of the disciples of John, concerning purifying.

John 4:1

Thus when the Lord knew when the Pharisees heard that Jesus is making and baptizing more disciples than John

Matthew 6:16

And when you may fast, be not like the hypocrites, of a sad contenance: for they disfigure their faces, in order that they may appear unto the people fasting. Truly I say unto you, They exhaust their reward.

Matthew 11:18-19

For John came neither eating nor drinking, and they say, He has a demon.

Mark 2:18-22

The disciples of John and the Pharisees were fasting. And they come and say to Him; Wherefore do the disciples of John and the Pharisees fast, and thy disciples do not fast?

Luke 5:33-39

And they said to Him, Wherefore do the disciples of John fast, and make supplications; likewise also those of the Pharisees; but thy disciples eat and drink?

Luke 18:9-12

And He spoke this parable to certain ones having confidence in themselves that they are righteous, and despising the rest.

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 you may fast, be not like the hypocrites, of a sad contenance: for they disfigure their faces, in order that they may appear unto the people fasting. Truly I say unto you, They exhaust their reward.
Matthew 11:18
For John came neither eating nor drinking, and they say, He has a demon.
Mark 2:18
The disciples of John and the Pharisees were fasting. And they come and say to Him; Wherefore do the disciples of John and the Pharisees fast, and thy disciples do not fast?
Luke 5:33
And they said to Him, Wherefore do the disciples of John fast, and make supplications; likewise also those of the Pharisees; but thy disciples eat and drink?
Luke 18:9
And He spoke this parable to certain ones having confidence in themselves that they are righteous, and despising the rest.