Sirach 30:10-12

New Revised Standard Version Catholic Edition

¹⁰ Do not laugh with him, or you will have sorrow with him,
    and in the end you will gnash your teeth.
¹¹ Give him no freedom in his youth,
    and do not ignore his errors.
¹² Bow down his neck in his youth,^[a]
    and beat his sides while he is young,
or else he will become stubborn and disobey you,
    and you will have sorrow of soul from him.^[b]