Sirach 30:7-9

New Revised Standard Version, Anglicised

⁷ Whoever spoils his son will bind up his wounds,
    and will suffer heartache at every cry.
⁸ An unbroken horse turns out stubborn,
    and an unchecked son turns out headstrong.
⁹ Pamper a child, and he will terrorize you;
    play with him, and he will grieve you.