Matsya Purana — Yayati and Indra: Counsel on Forbearance and Right Speech
वाक्सायका वदनान्निष्पतन्ति यैर् आहतः शोचति वा त्र्यहानि परस्य नो मर्मसु ते पतन्ति तान्पण्डितो नावसृजेत्परेषु //
vāksāyakā vadanānniṣpatanti yair āhataḥ śocati vā tryahāni parasya no marmasu te patanti tānpaṇḍito nāvasṛjetpareṣu //
Speech is an arrow shot forth from the mouth; struck by it, a person may grieve for three days. Yet those arrows do not pierce the vital points of another—therefore a wise man should not hurl such words at others.
This verse does not address pralaya; it teaches ethical restraint—how verbal harm affects the mind and social order rather than cosmic dissolution.
It frames controlled speech as a core duty of rajadharma and gṛhastha-dharma: a ruler or householder must avoid releasing cutting words that cause needless suffering and unrest in society.
No vastu, temple-building, or ritual procedure is mentioned; the significance is moral-psychological—speech discipline as a protective practice in daily conduct.