Mbh 9.47.4a

Vaishampayana said, "Agni of great energy became very much frightened at the curse of Bhrigu. Concealing himself within the entrails of the Sami wood, that adorable god disappeared from the view. Upon the disappearance of Agni, all the gods, with Vasava at their head, in great affliction, searched for the missing god. Finding Agni then, they saw that god lying within the entrails of the Sami wood. The celestials, O tiger among king, with Brihaspati at their head, having succeeded in finding out the god, became very glad with Vasava amongst them. They then returned to the places they had come from. Agni also, from Bhrigu's curse, became an eater of everything, as Bhrigu, that utterer of Brahma, had said. The intelligent Balarama, having bathed there, then proceeded to Brahmayoni where the adorable Grandsire of all the worlds had exercised his functions of creations. In days of yore, the Lord Brahman, along with all the gods, bathed in that tirtha, according to due rites for the celestials. Bathing there and giving away diverse kinds of gifts, Valadeva then proceeded to the tirtha called Kauvera where the puissant Ailavila, having practised severe austerities, obtained, O king, the Lordship over all treasures. While he dwelt there (engaged in austerities), all kinds of wealth, and all the precious gems came to him of their own accord. Baladeva having repaired to that tirtha and bathed in its waters duly gave much wealth unto the Brahamanas. Rama beheld at that spot the excellent woods of Kuvera. In days of yore, the high-souled Kuvera, the chief of the Yakshas, having practised the severest austerities there, obtained many boons. There were the lordship of all treasures, the friendship of Rudra possessed of immeasurable energy, the status of a god, the regency over a particular point of the compass (the north), and a son named Nakakuvera. These the chief of the Yakshas speedily obtained there, O thou of mighty arms!