@timur,
Proverbs 22:15
If folly settles in the heart of a lad,
The rod of discipline will remove it.
This passage has nothing, whatsoever to do with CHILD ABUSE.
The "'rod of discipline" does NOT mean that a piece of wood/steel/etc is/was used to DISCIPLINE the lad ( age not known, could be up to 35 or more years of age).
Discipline can take many forms, not one of which involves PHYSICAL punishment.
In the US, some killers are sentenced by law to MAX-security prisons where they are held in isolation from other humans. This is the ROD ordered through our courts to issue a form of DISCIPLINE, in which the ROD employed is "human isolation".
If you truly want to understand the words of the Prophets, I suggest that you consult a Hebrew text and seriously study the words.