Discipline can be painful for anyone especially from a church they love. All discipline serves a purpose especially for a Christian who has committed a sin.
A young child accidentally took sleeping pills from the medicine cabinet. The Dr. told the family to keep the child awake for the next 8 hours even if with the pain of a slap if need be. The pain was necessary for the child’s survival. So too in the Christians journey.
Hebrews 12:11
11 No discipline seems pleasant at the time, but painful. Later on, however, it produces a harvest of righteousness and peace for those who have been trained by it.