I recall having read that in the Talmud there is a comparison between the fangs of a snake and lashon hara, slander. It states that a snake will bite with his poisonous fangs to harm someone with no benefit to itself. This analogy is likened to the person who commits the sin of evil speech. Will you be kind enough to tell me where this teaching can be found? Many thanks.
This statement can be found in the Talmud in Arachin 15b and Ta'anit 8a.