512. So we learned, the children of Yisrael are called 'holiness,' and because they are 'holiness,' no one must call his neighbor a shameful name, and not make up a name for him, as there is a great penalty, all the more so in other matters. We learned, "Keep your tongue from evil" (Tehilim 34:14). What is meant by evil? As a result of bad talk, illnesses come to the world.