Mark 2:18
Now John's disciples and the Pharisees were fasting. And people came and said to him, "Why do John's disciples and the disciples of the Pharisees fast, but your disciples do not fast?"
Matthew 6:16
"And when you fast, do not look gloomy like the hypocrites, for they disfigure their faces that their fasting may be seen by others. Truly, I say to you, they have received their reward.
Matthew 6:18
that your fasting may not be seen by others but by your Father who is in secret. And your Father who sees in secret will reward you.
Matthew 9:14-17
Then the disciples of John came to him, saying, "Why do we and the Pharisees fast, but your disciples do not fast?"
Luke 18:12
I fast twice a week; I give tithes of all that I get.'
Luke 5:33-39
And they said to him, "The disciples of John fast often and offer prayers, and so do the disciples of the Pharisees, but yours eat and drink."
Romans 10:3
For, being ignorant of the righteousness of God, and seeking to establish their own, they did not submit to God's righteousness.