slander

V’al chet she-hatanu l’fanekha bil’shon ha-ra, “And for the sin we have committed before You through slander” — over the course of Yom Kippur we say these words over and over again as we recite the Viddui (Confessional) quietly to ourselves and then aloud communally. As we say them, we beat our breasts to physically hammer home the meaning of the words we say.