Vibhaṅgasutta

Suttapiṭaka · Saṁyuttanikāya · Mahāvaggasaṁyutta · Vol. 19 · Section 36

[36] And what, bhikkhus, is right speech (sammāvācā)? Abstinence (veramaṇī) from false speech, abstinence from divisive speech, abstinence from harsh speech, abstinence from idle chatter — this, bhikkhus, is called right speech.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.