Mahabharata Anushasna Parva Chapter 85:8

Mahabharata Anushasna Parva (Dana Dharma Parva) Chapter 85:8 The Rishis sprang from the pores of Agni's body. From his sweat sprang Chhandas, and from his strength sprang Mind. For this reason, Agni has been said to be all the deities in his individual self, by Rishis endued with Vedic lore, guided by the authority of the Vedas. The pieces of wood that keep alive the flames of Agni are regarded as the Months. The Juices that the fuel yields constitute the Fortnights. The liver of Agni is called the Day and Night, and his fierce light is called the Muhurtas. The blood of Agni is regarded as the source of the Rudras. From his blood sprang also the gold-complexioned deities called the Maitradevatas. From his smoke sprang the Vasus. From his flames sprang the Rudras as also the (twelve) Adityas of great effulgence. The Planets and Constellations and other stars that have been set in their respective orbits in the firmament, are regarded as the (burning) charcoals of Agni. The first Creator of the universe declared Agni to be Supreme Brahma and Eternal, and the giver of all wishes. This is verily a mystery. 'After all these births had taken place, Mahadeva who had assumed the form of Varuna (for his sacrifice) and who had Pavana for his soul, said, "This excellent Sacrifice is mine. I am the Grahapati in it. The very beings that first sprang from the sacrificial fire are mine. Without doubt, they should be regarded as my offspring. Know this, ye gods who range through the skies! They are the fruits of this Sacrifice. 'Agni said, "These offspring have sprung from my limbs. They have all depended upon me as the cause of their starting into life. They should, therefore, be regarded as my children. Mahadeva in the form of Varuna is in error in respect of this matter. After this, the master of all the worlds, the Grandsire of all creatures, viz., Brahman, then said, "These children are mine. The seed was mine which I poured upon the sacrificial fire. I am the accomplisher of this Sacrifice. It was I who poured on the sacrificial fire the seed that came out of myself. The fruit is always his who has planted the seed. The principal cause of these births is the seed owned by me." The deities then repaired to the presence of the Grandsire and having bowed their heads unto him joined their hands in reverence and they said unto him, "All of us, O illustrious one, and the entire universe of mobile and immobile creatures, are thy offspring. O sire, let Agni of blazing flames, and the illustrious and puissant Mahadeva who has, for this sacrifice, assumed the form of Varuna, have their wish (in the matter of the offspring)." At these words, although born of Brahman, the puissant Mahadeva in the form of Varuna, the ruler of all aquatic creatures received the firstborn one, viz., Bhrigu endued with the effulgence of the sun as his own child. The Grandsire then intended that Angiras should become the son of Agni. Conversant with the truth in respect of everything, the Grandsire then took Kavi as his own son. Engaged in procreating creatures for peopling the earth, Bhrigu who is regarded as a Prajapati thence came to be called as Varuna's offspring.