Bhagavatapurana 2.6.9

2.6.9

parābhūteradharmasya tamasaścāpi paścimaḥ /
nāḍyo nadanadīnāṃ ca gotrāṇām asthisaṃhatiḥ //

9. And His rectum is said to be the source of envy or harm (Himsa), ill-luck (Alakshmi), death and hell. His back is the source of Defeat, Vice and Ignorance.

10.—11. His pulse is (the vessels in the body are) the source of rivers (Nada and Nadi) and His bones are the source of mountains. His stomach is the source of the unmanifest Pradhana, (primordial matter) of the essence in food or essential foods, of oceans, of the beings that are produced, and of their destruction; and His heart is, the wise know, the source of the Manas, viz., the Linga sareera (the subtle body).