"My son, do not regard lightly the discipline of the Lord,
nor be weary when reproved by him.
For the Lord disciplines the one he loves,
and chastises every son whom he receives."
Hebrews 12:5b-6 ESV

For the moment all discipline seems painful rather than pleasant, but later
it yields the peaceful fruit of righteousness to those who have been trained
by it.
Hebrews 12:11 ESV