Hebrews 12:5-6, 10

And ye have forgotten the exhortation which speaketh unto you as unto children, My son, despise not thou the chastening of the Lord, Nor faint when thou art rebuked of him: For whom the Lord loveth he chasteneth, And scourgeth every son whom he receiveth.

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.