Kurma Purana — Uttara Bhaga, Shloka 9
Bhojana-vidhi and Nitya-karman: Directions for Eating, Prāṇa-Oblations, Sandhyā, and Conduct Leading to Apavarga
अमृतापिधानमसीत्युपरिष्टादपः पिबेत् / आचान्तः पुनराचामेदायं गौरिति मन्त्रतः
amṛtāpidhānamasītyupariṣṭādapaḥ pibet / ācāntaḥ punarācāmedāyaṃ gauriti mantrataḥ
「汝は甘露（アムリタ）の覆いなり」と唱えて、定法により上より水を啜るべし。アーチャマナを終えたなら、さらに「これは牝牛なり」という真言によって、規定どおり再びアーチャマナを行うべし。
Sūta (narrating traditional dharma-vidhi as received from the sages)
Primary Rasa: shanta
Secondary Rasa: adbhuta
FAQs
Indirectly: it frames purity and immortality-symbolism (“amṛta”) as a ritual orientation—preparing the practitioner’s body-mind for higher knowledge, where the Atman is approached through disciplined purification.
This is a preparatory discipline (śauca) rather than a meditation technique: mantra-guided ācamana trains attentiveness, ritual precision, and inner cleanliness—foundational for later Yoga-sādhana and Pāśupata-oriented observances.
Not by explicit theology here, but by shared dharma-practice: the same purificatory rite and mantra-discipline undergird both Śaiva and Vaiṣṇava sādhana in the Kurma Purana’s synthesis.