Matthew 9:14

Then come near unto him the disciples of John, saying, - Wherefore do, we, and the Pharisees, fast, whereas, thy disciples, fast not?

Matthew 11:2

Now, John, hearing in the prison the works of the Christ, sending through his disciples,

John 3:25

There arose, therefore, a questioning, from among the disciples of John, with a Jew, - concerning purification.

John 4:1

When therefore the Lord knew, that the Pharisees had heard - Jesus, more disciples, is making and immersing, than John, -

Proverbs 20:6

A kind man one may call, a great man, - but, a faithful man, who can find?

Matthew 6:16

And, when ye may he fasting, become not ye, as the hypocrites, of sullen countenance, - for they darken their looks, that they may appear, unto men, to be fasting: Verily, I say unto you, they are getting back their reward.

Matthew 11:18-19

For, John, came, neither eating nor drinking, and they say - A demon, he hath!

Mark 2:18-22

And the disciples of John and the Pharisees were fasting; and they come and say unto him - For what cause, do, the disciples of John and the disciples of the Pharisees, fast, whereas, thy disciples, fast not?

Luke 5:33-39

But, they, said unto him - The disciples of John, do fast much, and, supplications, do make, - likewise also the disciples of the Pharisees; but, thine, do eat and drink!

Luke 18:9-12

And he spake, even unto certain who were confident in themselves that they were righteous, and were despising the rest, this parable: -

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 may he fasting, become not ye, as the hypocrites, of sullen countenance, - for they darken their looks, that they may appear, unto men, to be fasting: Verily, I say unto you, they are getting back their reward.
Matthew 11:18
For, John, came, neither eating nor drinking, and they say - A demon, he hath!
Proverbs 20:6
A kind man one may call, a great man, - but, a faithful man, who can find?
Mark 2:18
And the disciples of John and the Pharisees were fasting; and they come and say unto him - For what cause, do, the disciples of John and the disciples of the Pharisees, fast, whereas, thy disciples, fast not?
Luke 5:33
But, they, said unto him - The disciples of John, do fast much, and, supplications, do make, - likewise also the disciples of the Pharisees; but, thine, do eat and drink!
Luke 18:9
And he spake, even unto certain who were confident in themselves that they were righteous, and were despising the rest, this parable: -