'Chastening' in the Bible

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:

If ye endure chastening, God dealeth with you as with sons; for what son is he whom the father chasteneth not?

and if ye are apart from chastening, of which all have become partakers, then bastards are ye, and not sons.

for they, indeed, for a few days, according to what seemed good to them, were chastening, but He for profit, to be partakers of His separation;

Now no chastening for the present seemeth to be joyous, but grievous: nevertheless afterward it yieldeth the peaceable fruit of righteousness unto them which are exercised thereby.