Matsyapurana 43.20

43.20

daśa yajñasahasrāṇi rājñāṃ dvīpeṣu vai tadā
nirargalāni vṛttāni śrūyante tasya dhīmataḥ //

Arjuna sought and got the boons of having a thousand arms, of the power of protecting the virtuous against the doers of evil deeds, the power of ruling the world righteously after conquering it, and his destruction in war at the hands of an adversary more valiant than himself. After thus getting those four boons by his valour, he conquered this world of seven continents by righteous war, conducted, according to the Kṣatra rules, together with the oceans and mountains. At his mere wish he got a thousand arms; and it is also said that, similarly, chariots and banners were also called into being. He performed ten thousand sacrifices and had access to every nook and corner of the universe. He gave enormous presents to the Brâhmaṇas at those sacrifices. On the occasion of those sacrifices, the pillars and the sacrificial altar were made of gold, and the Devas, seated in their Vimânas, the Gandharvas, men and Apsarâs took part in them.—16-22.