Adhyaya 89: शौचाचारलक्षणम् — सदाचार, भैक्ष्यचर्या, प्रायश्चित्त, द्रव्यशुद्धि, आशौच-निर्णय
मत्स्यगृह्यस्य यत्पापं षण्मासाभ्यन्तरे भवेत् एकाहं तत्समं ज्ञेयम् अपूतं यज्जलं भवेत्
matsyagṛhyasya yatpāpaṃ ṣaṇmāsābhyantare bhavet ekāhaṃ tatsamaṃ jñeyam apūtaṃ yajjalaṃ bhavet
Cualquier pecado que se acumule a quien mantiene peces dentro del hogar durante seis meses—sabe que la misma medida de demérito surge en un solo día cuando el agua que se usa permanece impura.
Suta Goswami (narrating Purana injunctions to the sages of Naimisharanya)
It elevates jala-śuddhi (purified water) as essential for Linga-pūjā, warning that using impure water quickly accumulates pāpa and obstructs the efficacy of worship.
By implication, Shiva as Pati is supremely pure (śuddha); approaching Him through the Linga requires the sādhaka (pashu) to reduce pasha (impurity/bondage) through disciplined śauca and correct ritual means.
Ritual śauca—especially purification and proper handling of water for abhiṣeka and daily worship—underscoring that external purity supports inner Pāśupata discipline.