Ben Sira 30:10

10 Laugh not with him, lest thou have sorrow, and at the last thy teeth be set on edge.

Ben Sira 30:10 In-Context

8 horse not broken becometh stubborn, and a child left to himself will become headstrong.

9 Give thy son his way, and he shall make thee afraid: play with him, and he shall make thee sorrowful.

10 Laugh not with him, lest thou have sorrow, and at the last thy teeth be set on edge.

11 Give him not liberty in his youth, and wink not at his devices.

12 Bow down his neck while he is young, and beat his sides while he is a child, lest he grow stubborn, and regard thee not, and so be a sorrow of heart to thee.