Bhagavatapurana 3.13.38

3.13.38

dīkṣānujanmopasadaḥ śirodharaṃ tvaṃ prāyaṇīyodayanīya-daṃṣṭraḥ /
jihvā pravargyas tava śīrṣakaṃ kratoḥ satyāvasathyaṃ citayo 'savo hi te //

37. Deeksha is Thy frequent manifestation, the sacrificial acts called Upasadas, three in number, are Thy neck; the two Ishties called Prayaneeya and Udayaneeya are Thy two tusks: Pravargya forms Thy tongue, the two fires Sabhya and Avasathya form the head of Thee that art in the form of Kratu (sacrifice); and the arrangement of bricks is Thy five Pranas.