“Silence is a protective fence for wisdom.”—Avot 3:17

“And you shall honor it [Shabbat] by abstaining from your affairs, by refraining from your wants, and by not engaging in [prohibited] speech.” —Isaiah 58:13

Rabbi Shammai said: “Say little and do much, and receive all men with a cheerful countenance.” —Avot 1:15

“For the whole of the Torah is summed up in this one sentence : 'Love your neighbor as yourself'; but if you go on snapping at each other and tearing each other to pieces, watch out, or you will be destroyed by each other!" —Galatians 5:13-15

"By the blessing of the upright, a city is raised up; but the words of the wicked tear it down. He who belittles another lacks good sense, whereas a person of discernment stays silent." —Proverbs 11:11-12

"Anyone who thinks he is religiously observant but does not control his tongue is deceiving himself, and his observance counts for nothing." —James 1:26

"Don't speak impulsively—don't be in a hurry to give voice to your words before God. For God is in heaven, and you are on earth; so let your words be few." —Ecclesiastes 5 :1-2

“Evil talk (lashon hara) is so grievous a sin because it kills three people: the one who speaks evil, the one who listens to evil talk, and the one who is being slandered.” —Talmud, Erechin 15b

“When a person insults someone else, it is his own defects that he is revealing.” —Talmud, Kiddushin 70a

“In an abundance of words, offense will not be lacking, but one who restrains his lips is wise.” —Proverbs 10:19