Shiva Purana
अविबद्धप्रलापत्वमसत्यं चाप्रियं च यत् ॥ परोक्षतश्च पैशुन्यं चतुर्द्धा कर्म वाचिकम् ॥ ४ ॥
Unconnected jabber, untruthful utterance, displeasing words and backbiting, these are the four types of verbal activity.
english translation
avibaddhapralApatvamasatyaM cApriyaM ca yat ॥ parokSatazca paizunyaM caturddhA karma vAcikam ॥ 4 ॥
hk transliteration by Sanscript