Adhyaya 89: शौचाचारलक्षणम् — सदाचार, भैक्ष्यचर्या, प्रायश्चित्त, द्रव्यशुद्धि, आशौच-निर्णय
एकाहाद् यज्ञयाजिनां शुद्धिरुक्ता स्वयंभुवा ततस्त्वधीतशाखानां चतुर्भिः सर्वदेहिनाम्
ekāhād yajñayājināṃ śuddhiruktā svayaṃbhuvā tatastvadhītaśākhānāṃ caturbhiḥ sarvadehinām
Своямбху (Брахма) провозгласил, что совершающие жертвоприношения очищаются за один день. Затем же для всех воплощённых существ — особенно для изучивших ведические шакхи — очищение достигается в течение четырёх дней.
Suta Goswami (narrating Purāṇic injunctions, attributed to Svayambhū/Brahmā)
It sets a baseline of ritual purity (śuddhi/śauca) as a prerequisite for valid worship and offerings, supporting disciplined approach to Shiva-puja where the Pashu (soul) prepares itself to approach Pati (Shiva).
Indirectly: it implies Shiva-puja is approached through dharmic order—purity and restraint—so the bound soul (Pashu) reduces Pāśa (impurity/limitations) and becomes fit for communion with the transcendent Pati.
Śauca (purificatory discipline) tied to Vedic practice—especially for yajña-performers and Veda-students—serving as a preparatory limb for Shiva worship and for higher Pāśupata-oriented sādhanā.