Matsyapurana 51.10

51.10

bhṛgoḥ prajāyatātharvā hy aṅgirātharvaṇaḥ smṛtaḥ
tasya hy alaukiko hy agnir dakṣiṇāgniḥ sa vai smṛtaḥ //

Atharvan was begotten from Bhṛigu, and Aṅgiras was the son of Atharvan, who begot the above-mentioned Alaukika Dakṣiṇa Agni.—10. Pavamâna is called Nirmathya Agni, also produced by (rubbing fire-sticks or) any friction, and the same is known as Gârhapatya Agni or Household Fire, the first fire amongst the Brâhmaṇas.—11.