Mbh 13.2.2c

'--The king craved a boon of the illustrious fire-god as the marriage dower,--'Do thou, O Agni, deign to remain always with us here.'--'Be it so'--said the divine Agni to that lord of Earth. For this reason Agni has always been present in the kingdom of Mahismati to this day, and was seen by Sahadeva in course of his conquering expedition to the south. Then the king gave his daughter, dressed in new garments and decked with jewels, to the high-souled deity, and Agni too accepted, according to Vedic rites, the princess Sudarsana as his bride, even as he accepts libations of clarified butter at sacrifices, Agni was well pleased with her appearance, her beauty, grace, character, and nobility of birth, and was minded to beget offspring upon her. And a son by Agni, of the name of Sudarsana, was soon born of her. Sudarsana also was, in appearance, as beautiful as the full moon, and even in his childhood he attained to a knowledge of the supreme and everlasting Brahma. There was also a king of the name of Oghavat, who was the grandfather of Nriga. He had a daughter of the name of Oghavati, and a son too of the name of Ogharatha born unto him. King Oghavat gave his daughter Oghavati, beautiful as a goddess, to the learned Sudarsana for wife. Sudarsana, O king, leading the life of a householder with Oghavati, used to dwell in Kurukshetra with her. This intelligent prince of blazing energy took the vow, O lord, of conquering Death by leading the life of even a householder. The son of Agni, O king, said to Oghavati,--'Do thou never act contrary to (the wishes of) those that seek our hospitality. Thou shouldst make no scruple about the means by which guests are to be welcomed, even if thou have to offer thy own person. O beautiful one, this vow is always present in the mind, since for householders, there is no higher virtue than hospitality accorded to guests. Do thou always bear this in mind without ever doubting it, if my words be any authority with thee.