ŚiraUpan, 1, 45.1 ya idam atharvaśiro brāhmaṇo 'dhīte aśrotriyaḥ śrotriyo bhavati anupanīta upanīto bhavati so 'gnipūto bhavati sa vāyupūto bhavati sa sūryapūto bhavati sa somapūto bhavati sa satyapūto bhavati sa sarvair devair jñāto bhavati sa sarvair vedair anudhyāto bhavati sa sarveṣu tīrtheṣu snāto bhavati tena sarvaiḥ kratubhir iṣṭaṃ bhavati gāyatryāḥ ṣaṣṭisahasrāṇi japtāni bhavanti itihāsapurāṇānāṃ rudrāṇāṃ śatasahasrāṇi japtāni bhavanti /