Matthew 6:16

And when ye fast, be not as the hypocrites, downcast in countenance; for they disfigure their faces, so that they may appear fasting to men: verily I say unto you, They have their reward.

Matthew 6:2

When therefore thou doest alms, sound not a trumpet before thee, as the hypocrites do in the synagogues and in the streets, so that they may have glory from men. Verily I say unto you, They have their reward.

Matthew 6:5

And when thou prayest, thou shalt not be as the hypocrites; for they love to pray standing in the synagogues and in the corners of the streets so that they should appear to men. Verily I say unto you, They have their reward.

Psalm 35:13

But as for me, when they were sick, my clothing was sackcloth; I chastened my soul with fasting, and my prayer returned into mine own bosom:

Psalm 69:10

And I wept, my soul was fasting: that also was to my reproach; --

Isaiah 58:3-5

Wherefore have we fasted, and thou seest not; have afflicted our soul, and thou takest no knowledge? Behold, in the day of your fast ye find what pleaseth you, and exact all your labours.

Luke 18:12

I fast twice in the week, I tithe everything I gain.

2 Samuel 12:16

And David besought God for the child; and David fasted, and went in, and lay all night on the earth.

2 Samuel 12:21

And his servants said to him, What thing is this which thou hast done? thou didst fast and weep for the child alive; but as soon as the child is dead, thou dost rise and eat bread.

1 Kings 21:27

And it came to pass when Ahab heard these words, that he rent his garments, and put sackcloth upon his flesh, and fasted, and lay in sackcloth, and went softly.

Nehemiah 1:4

And it came to pass, when I heard these words, that I sat and wept, and mourned for days, and fasted, and prayed before the God of the heavens,

Esther 4:16

Go, gather together all the Jews that are found in Shushan, and fast for me, and neither eat nor drink three days, night or day: I also and my maidens will fast likewise, and so will I go in unto the king, which is not according to the law; and if I perish, I perish.

Psalm 109:24

My knees are failing through fasting, and my flesh hath lost its fatness;

Daniel 9:3

And I set my face unto the Lord God, to seek by prayer and supplications, with fasting, and sackcloth, and ashes;

Zechariah 7:3-5

and to speak unto the priests that were in the house of Jehovah of hosts, and to the prophets, saying, Should I weep in the fifth month, separating myself, as I have done now so many years?

Malachi 3:14

Ye say, It is vain to serve God; and what profit is it that we keep his charge, and that we walk mournfully before Jehovah of hosts?

Matthew 9:14-15

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

Mark 2:18

And the disciples of John and the Pharisees were fasting; and they come and say to him, Why do the disciples of John and the disciples of the Pharisees fast, but thy disciples fast not?

Luke 2:37

and herself a widow up to eighty-four years; who did not depart from the temple, serving night and day with fastings and prayers;

Acts 10:30

And Cornelius said, Four days ago I had been fasting unto this hour, and the ninth I was praying in my house, and lo, a man stood before me in bright clothing,

Acts 13:2-3

And as they were ministering to the Lord and fasting, the Holy Spirit said, Separate me now Barnabas and Saul for the work to which I have called them.

Acts 14:23

And having chosen them elders in each assembly, having prayed with fastings, they committed them to the Lord, on whom they had believed.

1 Corinthians 7:5

Defraud not one another, unless, it may be, by consent for a time, that ye may devote yourselves to prayer, and again be together, that Satan tempt you not because of your incontinency.

2 Corinthians 6:5

in stripes, in prisons, in riots, in labours, in watchings, in fastings,

2 Corinthians 11:27

in labour and 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 come to him the disciples of John, saying, Why do we and the Pharisees often fast, but thy disciples fast not?
2 Samuel 12:16
And David besought God for the child; and David fasted, and went in, and lay all night on the earth.
Nehemiah 1:4
And it came to pass, when I heard these words, that I sat and wept, and mourned for days, and fasted, and prayed before the God of the heavens,
Esther 4:16
Go, gather together all the Jews that are found in Shushan, and fast for me, and neither eat nor drink three days, night or day: I also and my maidens will fast likewise, and so will I go in unto the king, which is not according to the law; and if I perish, I perish.
Psalm 35:13
But as for me, when they were sick, my clothing was sackcloth; I chastened my soul with fasting, and my prayer returned into mine own bosom:
Psalm 69:10
And I wept, my soul was fasting: that also was to my reproach; --
Psalm 109:24
My knees are failing through fasting, and my flesh hath lost its fatness;
Daniel 9:3
And I set my face unto the Lord God, to seek by prayer and supplications, with fasting, and sackcloth, and ashes;
Luke 2:37
and herself a widow up to eighty-four years; who did not depart from the temple, serving night and day with fastings and prayers;
Acts 10:30
And Cornelius said, Four days ago I had been fasting unto this hour, and the ninth I was praying in my house, and lo, a man stood before me in bright clothing,
Acts 13:2
And as they were ministering to the Lord and fasting, the Holy Spirit said, Separate me now Barnabas and Saul for the work to which I have called them.
Acts 14:23
And having chosen them elders in each assembly, having prayed with fastings, they committed them to the Lord, on whom they had believed.
1 Corinthians 7:5
Defraud not one another, unless, it may be, by consent for a time, that ye may devote yourselves to prayer, and again be together, that Satan tempt you not because of your incontinency.
2 Corinthians 6:5
in stripes, in prisons, in riots, in labours, in watchings, in fastings,
2 Corinthians 11:27
in labour and toil, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness.

Be

Matthew 6:2
When therefore thou doest alms, sound not a trumpet before thee, as the hypocrites do in the synagogues and in the streets, so that they may have glory from men. Verily I say unto you, They have their reward.
1 Kings 21:27
And it came to pass when Ahab heard these words, that he rent his garments, and put sackcloth upon his flesh, and fasted, and lay in sackcloth, and went softly.
Isaiah 58:3
Wherefore have we fasted, and thou seest not; have afflicted our soul, and thou takest no knowledge? Behold, in the day of your fast ye find what pleaseth you, and exact all your labours.
Zechariah 7:3
and to speak unto the priests that were in the house of Jehovah of hosts, and to the prophets, saying, Should I weep in the fifth month, separating myself, as I have done now so many years?
Malachi 3:14
Ye say, It is vain to serve God; and what profit is it that we keep his charge, and that we walk mournfully before Jehovah of hosts?
Mark 2:18
And the disciples of John and the Pharisees were fasting; and they come and say to him, Why do the disciples of John and the disciples of the Pharisees fast, but thy disciples fast not?
Luke 18:12
I fast twice in the week, I tithe everything I gain.