Mbh 5.100.1a

“‘Narada continued, “Here is that spacious and celebrated city of cities, called Hiranyapura, belonging to the Daityas and Danavas, possessing a hundred diverse kinds of illusion. Here in these regions called Patala, it hath been built with great care by the divine artificer, and planned by the Danava Maya. Endued with great energy and heroism, many Danavas, having obtained boons (from Brahman) in days of old, lived here, exhibiting a thousand different kinds of illusion. They were incapable of being vanquished by Sakra or any other celestial, that is, by either Yama, or Varuna, or the Lord of treasures (Kuvera). Here dwell, O Matali, those Asuras called Kalakhanjas who sprang from Vishnu, and those Rakshasas also called Yatudhanas who sprang from the feet of Brahman. All of them are endued with frightful teeth, terrible impetus, the speed and prowess of the wind, and great energy depending on powers of illusion. Besides these, another class of Danavas called Nivatakavachas, who are invincible in battle, have their abode here. Thou knowest how Sakra is unable to vanquish them. Many times, O Matali, thou, with thy son Gomukha, and the chief of the celestials and lord of Sachi, along with his son, had to retreat before them. Behold their homes, O Matali, that are all made of silver and gold, and well-adorned with decorations done according to the rules of art. All those mansions are decked with lapis lazuli and corals, and made effulgent with the lustre of the Arkasphatika, and the radiance of gem called Vajrasara. And many of those palatial residences seem as if they have been made of the shine of these gems called Padmaragas, or of bright marble, or of excellent wood. And they are also possessed of the radiance of the sun, or blazing fire. And all the edifices, adorned with gems and jewels, are very high and stand close to another.