Agnibheda–Vaṃśa: Forms of Agni, Their Functions, and Progeny (अग्निभेद-वंशः)
प्रतल्कान्यो नभोनाम चत्वरेसौ विभाव्यते / हव्यस्ततो ह्यसंमृष्टः शामित्रे ऽग्नौ विभाव्यते
pratalkānyo nabhonāma catvaresau vibhāvyate / havyastato hyasaṃmṛṣṭaḥ śāmitre 'gnau vibhāvyate
The Pratalkānya, called Nabho, is regarded as established in this catvara; thereafter the fire named Havya, untouched and untainted, is regarded as established in the Śāmitra fire.