Bhagavatapurana 5.20.35

5.20.35

_*
yāvan mānasottara-mervor antaraṃ tāvatī bhūmiḥ kāñcany anyādarśa-talopamā yasyāṃ prahitaḥ padārtho na kathañcit punaḥ pratyupalabhyate tasmāt sarva-sattva-parihṛtāsīt //

35. Beyond the Lokaloka mountains, there stretches a tract of land, all gold, between Meru and Manasottara. It is like a sheet of mirror; anything that goes into that land is never to be seen again and therefore it is avoided by every living being.