The Asuras gifted with great energy had formerly threc cities in the firmament. One of these had been, made of iron; one of silver; and the third of gold.
असुराणां पुराण्यासंस्त्रीणि वीर्यवतां दिवि। आयसं राजतं चैव सौवर्णमपि चापरम्॥