Speech that causes no agitation, true, pleasant and beneficial, and also the study of Scriptures — that is said to be the austerity of speech.

Tapas of speech (vāṅmaya). Vākya — spoken word, with four qualities: anudvega-karam — not causing agitation; satya — true; priya — pleasant; hita — beneficial.

Svādhyāya-abhyasanam — study (abhyasana) of the personal study of sacred texts (svādhyāya). Disciplined speech — truthful, benevolent, useful — is austerity of the organ of expression.