Sirach 23:7

7 Hear, O ye children, the discipline of the mouth: he that keepeth it shall never be taken in his lips.

Sirach 23:7 In-Context

5 Turn away from me vain hopes and concupiscence, and thou shalt hold him up that is desirous always to serve thee.

6 Let not the greediness of the belly nor lust of the flesh take hold of me; and give not over me thy servant into an impudent mind.

7 Hear, O ye children, the discipline of the mouth: he that keepeth it shall never be taken in his lips.

8 The sinner shall be left in his foolishness: both the evil speaker and the proud shall fall thereby.

9 Accustom not thy mouth to swearing; neither use thyself to the naming of the Holy One.