ŚiraUpan, 1, 33.4 kim u dhūrtir amṛtaṃ martyasya somasūryapurastāt sūkṣmaḥ puruṣaḥ /

ŚiraUpan, 1, 33.5 sarvaṃ jagaddhitaṃ vā etad akṣaraṃ prājāpatyaṃ saumyaṃ sūkṣmaṃ puruṣaṃ grāhyam aguhyena bhāvaṃ bhāvena saumyaṃ saumyena sūkṣmaṃ sūkṣmena vāyavyaṃ vāyavyena grasati tasmai mahāgrāsāya vai namonamaḥ /

ŚiraUpan, 1, 45.4 ā saptamāt puruṣayugān punātīty āha bhagavān atharvaśiraḥ sakṛj japtvaiva śuciḥ sa pūtaḥ karmaṇyo bhavati /