One verse

Srimad Bhagavatam 2.10.28

2.10.28

आसिसृप्सो: पुर: पुर्या नाभिद्वारमपानत: । तत्रापानस्ततो मृत्यु: पृथक्त्वमुभयाश्रयम् ॥ २८ ॥

asisrpsoh purah purya nabhi-dvaram apanatah tatrapanas tato mrtyuh prthaktvam ubhayasrayam

asisrpsoh
desiring to go everywhere
purah
in different bodies
puryah
from one body
nabhi-dvaram
the navel or abdominal hole
apanatah
was manifested
tatra
thereupon
apanah
stopping of the vital force
tatah
thereafter
mrtyuh
death
prthaktvam
separately
ubhaya
both
asrayam
shelter.

Thereafter, when He desired to move from one body to another, the navel and the air of departure and death were combinedly created. The navel is the shelter for both, namely death and the separating force.