Adhyaya 8: Yogasthanas, Ashtanga Yoga, Pranayama-Siddhi, and Shiva-Dhyana leading to Samadhi
नाश्लीलं कीर्तयेदेवं ब्राह्मणानामिति श्रुतिः परदोषान् परिज्ञाय न वदेदिति चापरम्
nāślīlaṃ kīrtayedevaṃ brāhmaṇānāmiti śrutiḥ paradoṣān parijñāya na vadediti cāparam
பிராமணர்களுக்கென ஸ்ருதி கூறுகிறது—அச்லீலமான, அநாகரிகமானவற்றைச் சொல்லக் கூடாது; மேலும் மற்றொரு போதனை—பிறரின் குறைகளை அறிந்தாலும் அவற்றைச் சொல்ல வேண்டாம்।
Suta Goswami (narrating dharma teachings within the Linga Purana discourse)
It establishes vāk-śuddhi (purity of speech) as a prerequisite for Śiva-pūjā: avoiding obscene talk and fault-finding reduces pāśa (bondage) and makes the worshipper fit to approach Pati (Śiva).
Indirectly, it points to Śiva-tattva as purity and auspiciousness (śivam): the devotee aligns with that auspicious reality by restraining impure speech and abandoning slander, which are expressions of mala (impurity).
A discipline of speech-restraint (vāk-niyama)—a practical ethical limb supporting Pāśupata-style sādhanā and the inner purification required for mantra-japa and liṅga-arcana.