Bhagavatapurana 6.16.37

6.16.37

kṣityādibhireṣa kilāvṛtaḥ saptabhirdaśaguṇottarairaṇḍakośaḥ /
yatra pataty aṇukalpaḥ sahāṇḍakoṭikoṭibhistadanantaḥ //

37. This egg of the Universe is surrounded by seven enclosures or vestures of the earth and other things, each outer vesture b ten times the extent of the enclosure inner to it and this egg of the Universe together with crores and crores of universes seem to be an atom on Thy head: hence Thou art Ananta, the unlimited.