Bhagavatapurana 5.16.7

5.16.7

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eṣāṃ madhye ilāvṛtaṃ nāmābhyantara-varṣaṃ yasya nābhyām avasthitaḥ sarvataḥ sauvarṇaḥ kula-giri-rājo merur dvīpāyāma-samunnāhaḥ karṇikā-bhūtaḥ kuvalaya-kamalasya mūrdhani dvā-triṃśat sahasra-yojana-vitato mūle ṣoḍaśa-sahasraṃ tāvat āntar-bhūmyāṃ praviṣṭaḥ //

7. At the centre of these continents is situated the inner continent of Ilavrita, at the centre of which stands the all-gold mount of Meru, lord of all mountains, equal in height to the length of the Dwipa (Jambu Dwipa) and in shape like unto the seed-vessel of the lotus of the globe, 32 thousand yojanas broad at the bottom, (where it touches the surface of the earth), its root lying under the earth to the depth of the same extent (16 thousand yojanas).