स्नानविधिः — गायत्र्यावाहन, सूर्यवन्दन, तर्पण, पञ्चमहायज्ञ, भस्मस्नान, मन्त्रस्नान
पुण्यमाचमनं कुर्याद् ब्रह्मयज्ञार्थमेव तत् प्रीत्यर्थं च ऋचां विप्राः त्रिः पीत्वा प्लाव्य प्लाव्य च
puṇyamācamanaṃ kuryād brahmayajñārthameva tat prītyarthaṃ ca ṛcāṃ viprāḥ triḥ pītvā plāvya plāvya ca
唯为梵祭(Brahma‑yajña)之故,当行净化的阿遮摩那(ācamana)。诸婆罗门啊,为令吠陀之ṛc圣颂欢喜,应三次啜水,并于每次反复漱口以净。
Suta Goswami (narrating Purāṇic injunctions to the sages of Naimiṣāraṇya)
It establishes ācamana as a mandatory act of ritual purity before Brahma-yajña and, by extension, before Shiva-pūjā to the Liṅga—purifying the devotee (paśu) so worship is offered in a fit state to Pati (Śiva).
Indirectly, it points to Śiva as the Pati who is approached through śuddhi (purification) and Vedic sanctity—suggesting that disciplined purity and reverence for mantra/ṛc align the paśu toward Shiva-tattva.
Ācamana performed three times with repeated rinsing—an external śauca practice that supports Vedic recitation (Brahma-yajña) and steadies the practitioner for Shaiva worship and Pāśupata-oriented discipline.