Garudapurana 1.67.7

1.67.7

dehamadhye sthitā nāḍyo bahurūpāḥ suvistarāḥ /
nābheradhastādyaḥ kandastvaṅkurāstatra nirgatāḥ //

Within the body abide the channels, multiform and very extensive. / From the bulb situated below the navel, sprouts have emerged there;