Proverbs 10:19 When words are many, transgression is not lacking, but whoever restrains his lips is prudent.
Proverbs 29:20 Do you see a man hasty in his words? There is more hope for a fool than for him.
Proverbs 11:12,13 Whoever belittles his neighbor lacks sense, but a man of understanding remains silent. Whoever goes about slandering reveals secrets, but he who is trustworthy in spirit keeps a thing covered.
Proverbs 21:23 Whoever keeps his mouth and his tongue keeps himself out of trouble.