¹⁵ The rod of correction gives wisdom,
    but a child left to himself causes shame to his mother.

¹⁷ Correct your son, and he will give you peace;
    yes, he will bring delight to your soul.

¹⁹ A servant can’t be corrected by words.
    Though he understands, yet he will not respond.

²¹ He who pampers his servant from youth
    will have him become a son in the end.