Now no chastening seems to be joyful for the present, but painful; nevertheless, afterward it yields the peaceable fruit of righteousness to those who have been trained by it.
Hebrews 12:11
Surrounding context
12:10 For they indeed for a few days chastened us as seemed best to them, but He for our profit, that we may be partakers of His holiness.
12:11 Now no chastening seems to be joyful for the present, but painful; nevertheless, afterward it yields the peaceable fruit of righteousness to those who have been trained by it.
12:12 Therefore strengthen the hands which hang down, and the feeble knees,