Verses with the word fastings in the New Testament (3 verses):

Luke 2:37
And she was a widow of about fourscore and four years, which departed not from the temple, but served God with fastings and prayers night and day.

2 Corinthians 6:5
In stripes, in imprisonments, in tumults, in labours, in watchings, in fastings;

2 Corinthians 11:27
In weariness and painfulness, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness.