10 In proportion to the fuel, so will the fire burn, and in proportion to the obstinacy, so will strife increase; in proportion to a person's strength will be his anger, and in proportion to his wealth he will increase his wrath. 11 A hasty quarrel kindles a fire, and a hasty dispute sheds blood. 12If you blow on a spark, it will glow; if you spit on it, it will be put out; yet both come out of your mouth.13 Curse the gossips and the double-tongued, for they destroy the peace of many. 14 Slander has shaken many, and scattered them from nation to nation; it has destroyed strong cities, and overturned the houses of the great. 15 Slander has driven virtuous women from their homes, and deprived them of the fruit of their toil. 16 Those who pay heed to slander will not find rest, nor will they settle down in peace. 17 The blow of a whip raises a welt, but a blow of the tongue crushes the bones. 18 Many have fallen by the edge of the sword, but not as many as have fallen because of the tongue.
Date: 195-175 B.C.E. (based on scholarly estimates)
Leviticus Rabbah 33
"And Ad-nai said to Moshe... 'When you sell goods to your people [you shall not wrong one another]' (Leviticus 25:1-14)." Another verse: "Life and death and in the hand of the tongue", the translation of Onkelos 'mystromakerion' [an eating utensil, a side is a spoon the other a knife] death from this side and life from this side. Bar Sira said: 'there is a fiery coal in front of him, if he blows on it it catches fire, if he spits he puts it out.' Rabbi Yannai said: if he had a piece of bread in front of him and ate it without tithing, this is 'death by the hand of the tongue'; if he tithed it before eating, this is 'life by the hand of the tongue.' Said Rabbi Chiya bar Abba: If he had a basket of figs. If he ate them before he separated off tithes, then it is death by the hand of the tongue. If he separated off tithes and then ate, it is life by the hand of the tongue. Rabbi Shimon ben Gamliel said to Tavi his servant, "go purchase for me the best food from the market." He went and bought for him a tongue. He said to him "go purchase for me the worse food from the market." He went out and bought him a tongue. He said to him, "What is this? When I say to you to the best food, you buy me a tongue, and when I say to you the worst food, you [also] buy me tongue!" [Tavi] said to him, this is the best and this is the worst! When it is good, there is none better than it, and when it is bad, there is no worse than it." Rabbi made a feast for his students, and brought before them tender tongues and tough tongues. They began to choose for themselves the tender tongues and left alone the tough tongues. He said to them, "Know what you are doing! Just as you are choosing the tender [tongues] and leaving alone the tough ones, so shall your own tongues be with one another. Thefore Moshe warned Israel, 'and when you sell goods... [you shall not wrong one another]'