Mark 2:18
And the disciples of John and of the Pharisees fasted. And they came and said to him, Why do the disciples of John and the disciples of the Pharisees fast, and your disciples fast not?
Matthew 6:16
And when you fast, be not like the hypocrites, of a sad countenance; for they disfigure their faces that they may appear to men to fast. I tell you truly, they have their reward.
Matthew 6:18
that you may not appear to men to fast, but to your Father in secret; and your Father who sees in secret shall reward you.
Matthew 9:14-17
Then came to him the disciples of John, saying, Why do we and the Pharisees fast much, but your disciples fast not?
Luke 18:12
I fast twice a week; I tithe all I acquire.
Matthew 23:5
And they do all their works to be seen by men. For they make broad their prayer fillets, and enlarge the fringes,
Luke 5:33-39
And they said to him, The disciples of John fast much and make prayers; and likewise those of the Pharisees; but yours eat and drink.
Romans 10:3
for not knowing God's righteousness, and seeking to set up their righteousness, they have not submitted themselves to God's righteousness.