Samavedabrahmananyashtau 221.4

Sāmavedabrāhmaṇānyaṣṭau 221.4

śiro vā agre sambhavataḥ sambhavati caturddhāvihitaṃ vai
śiraḥ prāṇaścakṣuḥ śrotraṃ vāgātmā vai pṛṣṭhāni yatpṛṣṭhānyupaiti
śiraevātmānamanusandadhāti