Hebrews 12:6, 8, 10

For whom the Lord loveth he chasteneth, And scourgeth every son whom he receiveth.

But if ye be without chastisement, whereof all are partakers, then are ye bastards, and not sons.

For they verily for a few days chastened us after their own pleasure; but he for our profit, that we might be partakers of his holiness.