Sirach 30:12

12 Bruise their sides while they are still young, or else they will become stubborn and disobey you.

Sirach 30:12 In-Context

10 Don't laugh together with them, so that you don't suffer together and in the end grind your teeth in regret.

11 Don't give them free rein in their youth.

12 Bruise their sides while they are still young, or else they will become stubborn and disobey you.

13 Educate your children, and work on them, so that you don't end up offended by their shameful behavior.

14 It is better to be poor, but healthy and strong, than a rich person whose body is afflicted.