Devibhagavatapurana 3.13.8

3.13.8

madhukaiṭabhayormedaḥ saṃyogānmedinī smṛtā |
dhāraṇācca dharā proktā pṛthvī vistārayogataḥ ||

O King! The name of this earth is Medinî, since it was made out of the marrow of the two Asuras Madhu and Kaitabha. This earth is termed Dharâ because it supports all; is termed Prithvî because it is very capacious; and it is called Mahî because it is great, since it supports so many beings. O King! the Ananta serpent is holding it on her thousand-hoods. To make the earth remain solid and compact, Brahmâ built at places mountains. As iron nails in a log of wood, so these hills and mountains within this earth made it fixed. Therefore the Pundits call these mountains “Mahîdhara,” holder of the earth.