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.
512. תָּאנָא, יִשְׂרָאֵל אִקְרוּן קֹדֶשׁ, וּבְגִין דְּאִינּוּן קֹדֶשׁ, אָסִיר לֵיהּ לֶאֱינָשׁ, לְמִקְרֵי לְחַבְרֵיהּ בִּשְׁמָא דִּגְנָאי, וְלָא לְכַנָּאָה שְׁמָא לְחַבְרֵיהּ, וְעֹנְשֵׁיהּ סַגִּי. וְכָל שֶׁכֵּן בְּמִלִּין אַחֲרָנִין. תָּאנָא, כְּתִיב נְצוֹר לְשׁוֹנְךָ מֵרָע וְגוֹ.' מַהוּ מֵרָע. דִּבְגִין לִישָׁנָא בִּישָׁא, מַרְעִין נַחְתִּין לְעָלְמָא.