उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
नखाग्रकेशनिर्धूतस्नानवस्त्रघटोदकम् अश्रीकरं मनुष्याणाम् अशुद्धं संस्पृशेद्यदि
nakhāgrakeśanirdhūtasnānavastraghaṭodakam aśrīkaraṃ manuṣyāṇām aśuddhaṃ saṃspṛśedyadi
நகங்களின் முனை, முடியின் முனை ஆகியவற்றிலிருந்து சிதறும் நீர், ஸ்நானத் துணியிலிருந்து வரும் நீர், ஸ்நானக் குடத்தின் நீர்—இவை மனிதர்க்கு அசுபமானவை; இவற்றைத் தொடுதல் அசுத்தத் தொடர்பாகும்।
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.