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
وهكذا تُصرّح الشروتي للبراهمة: لا ينبغي ذكرُ ما هو فاحشٌ أو غير لائق. وتعليمٌ آخر يقول: حتى بعد تمييز عيوب الآخرين، لا ينبغي التحدّث بها.
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.