He that spares his rod hates his son: but he that loves him chastens him early.
All Commentaries on Proverbs 13:24 Go To Proverbs 13
Ambrose of Milan
The correction of the father who does not spare the rod is useful, that he may render his son’s soul obedient to the precepts of salvation. He punishes with a rod, as we read, “I shall punish their offenses with a rod.”