Sadācāra–Varṇa-lakṣaṇa and Prātaḥkṛtya
Right Conduct, Social Typologies, and Morning Purification
आपोहिष्ठेति शिरसि प्रोक्षयेत्पापशांतये । यस्येति मंत्रं पादे तु संधिप्रोक्षणमुच्यते
āpohiṣṭheti śirasi prokṣayetpāpaśāṃtaye | yasyeti maṃtraṃ pāde tu saṃdhiprokṣaṇamucyate
罪を鎮めるため、「Āpo hi ṣṭhā…」に始まる真言を唱えつつ、頭上に浄水を灑ぐべきである。また「Yasya…」に始まる真言は足に施す—これを儀礼における関節(肢分)への灑水(サンディ・プロークシャナ)という。
Suta Goswami
Tattva Level: pasha
Shiva Form: Mahādeva
It teaches that inner and outer purity support Shiva-upāsanā: sprinkling sanctified water with Vedic mantras is prescribed to calm the effects of pāpa and make the practitioner fit for devotion to Pati (Shiva).
Before approaching Saguna Shiva in the form of the Linga, the worshipper performs ritual śuddhi (purification). Prokṣaṇa prepares the body and senses so the subsequent linga-pūjā, abhiṣeka, and mantra-japa are done in a consecrated state.
Perform prokṣaṇa (sprinkling) with clean water: recite “Āpo hi ṣṭhā…” while sprinkling the head, and recite “Yasya…” while sprinkling the feet (as limb/joint purification) before continuing Shiva pūjā.