आत्मश्लाघा परनिन्दा पैशुन्यमनृतं तथा ।
असम्बन्धप्रलापश्च वाचिकं तु मलं स्मृतम् ॥
ātma-ślāghā para-nindā paiśunyam anṛtaṁ tathā |
asambandha-pralāpaś ca vācikaṁ tu malaṁ smṛtam ||
(Unknown Source)
“Self-praise, defamation of others, slander, falsity, and irrelevant chatter—these are known as impurities of speech.”