Srimad Bhagavatam Canto 05, Chapter 20, Text 35

SB 5.20.35

yavan manasottara-mervor antaram tavati bhumih kañcany anyadarsa-talopama yasyam prahitah padartho na kathañcit punah pratyupalabhyate tasmat sarva-sattva-parihrtasit.
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Beyond the ocean of sweet water is a tract of land as broad as the area between the middle of Mount Sumeru and the boundary of Manasottara Mountain. In that tract of land there are many living beings. Beyond it, extending to Lokaloka Mountain, is another land, which is made of gold. Because of its golden surface, it reflects light like the surface of a mirror, and any physical article that falls on that land can never be perceived again. All living entities, therefore, have abandoned that golden land.
Srimad Bhagavatam Canto 05, Chapter 20, Text 34
Srimad Bhagavatam Canto 05, Chapter 20, Text 36