उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
नखाग्रकेशनिर्धूतस्नानवस्त्रघटोदकम् अश्रीकरं मनुष्याणाम् अशुद्धं संस्पृशेद्यदि
nakhāgrakeśanirdhūtasnānavastraghaṭodakam aśrīkaraṃ manuṣyāṇām aśuddhaṃ saṃspṛśedyadi
إذا لمس المرء ما هو نجسٌ ومشؤومٌ على البشر—كماءٍ نُفِضَ من أطراف الأظفار والشَّعر، أو ماءِ ثوب الاستحمام وإناءِ الاستحمام—فإن ذلك الملامسة تُعَدّ aśuddha (نجاسةً طقسيّة)، وتَحُول دون البركة المطلوبة لعبادة شِيفا.
Suta Goswami
It sets a śauca standard for approaching the Liṅga: contact with discarded bathing water (from nails, hair, cloth, or pot) is treated as aśuddha, since Śiva-pūjā requires auspiciousness and careful handling of sanctified substances.
By implication, Śiva as Pati is approached through order (vidhi) and purity: the soul (paśu) bound by impurities (pāśa) must remove external and internal taints; ritual discipline mirrors the deeper purification needed to align with Śiva-tattva.
Ritual śauca: avoiding contact with impure remnants of bathing and maintaining cleanliness around worship materials; as a yogic takeaway, it points to disciplined purification as a prerequisite for Pāśupata-oriented sādhana.