Proverbs 12:18

Speaketh like the piercings of a sword, hurtful and pernicious words, whereby they either corrupt men's minds and manners, or scandalize them, or injure them in their reputation, estate, or life, or otherwise. The tongue of the wise is health; his speech, both in judgment and in common discourse, is sound and wholesome in itself, and tending to the comfort and benefit of others.