Bhagavatapurana 2.5.36

2.5.36

yasyehāvayavairlokān kalpayanti manīṣiṇaḥ /
kaṭyādibhiradhaḥ sapta saptordhvaṃ jaghanādibhiḥ //

36. The wise think that the worlds were evolved out of this body (of the Supreme Person,) and tell us that the arrangement of the worlds depends upon the parts of this body—seven below, commencing with the loins downwards, and seven above commencing with the hips upwards.