Bhagavatapurana 5.20.30

5.20.30

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tad-dvīpa-madhye mānasottara-nāmaika evārvācīna-parācīna-varṣayor maryādācalo 'yuta-yojanocchrāyāyāmo yatra tu catasṛṣu dikṣu catvāri purāṇi loka-pālānām indrādīnāṃ yad-upariṣṭāt sūrya-rathasya meruṃ paribhramataḥ saṃvatsarātmakaṃ cakraṃ devānām aho-rātrābhyāṃ paribhramati //

30. In the middle of this Dwipa rises but one mountain Manasothara by name, forming the boundary of the two continents, east and west, into which it is divided; it is ten thousand yojanas both in length and breadth; and there, in the four directions, there are four cities belonging to Indra and other gods, gaurdians of the world; being fixed on to its top rotates, round the Meru, in the space of a day and a night of the celestials, the wheel of the sun's chariot, which makes the year.