Agnipurana 379.8

379.8

bhūmau pādayugantasthau jaṅghe pādadvaye sthite /
urū jaṅghādvayāvasthau tadādhāraṃ tathodaram //

The pair of feet rests on the earth, the shanks rest on the pair of feet, / the thighs rest on the pair of shanks, and the abdomen has them as its base;