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
শ্রুতি ব্রাহ্মণদের জন্য বলে—অশ্লীল বা অশোভন কথা বর্ণনা করবে না; আর আরেক উপদেশ—পরের দোষ জেনেও তা উচ্চারণ করবে না।
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.