Matthew 6:16

And when you fast, do not put on a sad countenance, as the hypocrites do; for they disfigure their faces, that they may appear to men to be fasting. Verily, I say to you, They have their reward.

Matthew 6:2

When, therefore, you do a charitable deed, do not cause a trumpet to be sounded before you, as the hypocrites do, in the synagogues and in the streets, that they may be glorified by men. Verily, I say to you, They have their reward.

Matthew 6:5

And when you pray, you shall not be like the hypocrites; for they love to pray standing in the synagogues, and in the corners of the streets, that they may be seen by men. Verily, I say to you, They have their reward.

Luke 18:12

I fast twice in the week; I give tithes of all that I possess.

Matthew 9:14-15

Then came to him the disciples of John, saying: Why do we and the Pharisees fast often, but your disciples fast not?

Mark 2:18

And the disciples of John and of the Pharisees were in the habit of fasting; and they came, and said to him: Why do the disciples of John and of the Pharisees fast, but your disciples fast not?

Luke 2:37

and she was a widow of about eighty-four years, and she departed not from the temple, but served, day and night, with fastings and prayers.

Acts 10:30

And Cornelius replied: Four days ago, I was fasting till this hour; and, at the ninth hour, I was praying in my house; and behold, a man stood before me in bright clothing,

Acts 13:2-3

And while they were ministering to the Lord, and fasting, the Holy Spirit said: Set apart for me Barnabas and Saul, to the work to which I have called them.

Acts 14:23

And when they had appointed elders for them in every church, with prayer and fasting, they commended them to the Lord, on whom they believed.

1 Corinthians 7:5

Debar not one another, unless by agreement for a time, that you may have leisure for prayer; and come together again, lest Satan tempt you through your incontinence.

2 Corinthians 6:5

in stripes, in prisons,, in commotions, in labors, in watchings, in fastings;

2 Corinthians 11:27

in weariness and in toil, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness:

Treasury of Scripture Knowledge

Summary

Moreover when ye fast, be not, as the hypocrites, of a sad countenance: for they disfigure their faces, that they may appear unto men to fast. Verily I say unto you, They have their reward.

Bible References

When

Matthew 9:14
Then came to him the disciples of John, saying: Why do we and the Pharisees fast often, but your disciples fast not?
Luke 2:37
and she was a widow of about eighty-four years, and she departed not from the temple, but served, day and night, with fastings and prayers.
Acts 10:30
And Cornelius replied: Four days ago, I was fasting till this hour; and, at the ninth hour, I was praying in my house; and behold, a man stood before me in bright clothing,
Acts 13:2
And while they were ministering to the Lord, and fasting, the Holy Spirit said: Set apart for me Barnabas and Saul, to the work to which I have called them.
Acts 14:23
And when they had appointed elders for them in every church, with prayer and fasting, they commended them to the Lord, on whom they believed.
1 Corinthians 7:5
Debar not one another, unless by agreement for a time, that you may have leisure for prayer; and come together again, lest Satan tempt you through your incontinence.
2 Corinthians 6:5
in stripes, in prisons,, in commotions, in labors, in watchings, in fastings;
2 Corinthians 11:27
in weariness and in toil, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness:

Be

Matthew 6:2
When, therefore, you do a charitable deed, do not cause a trumpet to be sounded before you, as the hypocrites do, in the synagogues and in the streets, that they may be glorified by men. Verily, I say to you, They have their reward.
Mark 2:18
And the disciples of John and of the Pharisees were in the habit of fasting; and they came, and said to him: Why do the disciples of John and of the Pharisees fast, but your disciples fast not?
Luke 18:12
I fast twice in the week; I give tithes of all that I possess.