Bhagavatapurana 2.10.25

2.10.25

gatiṃ jigīṣataḥ pādau ruruhāte 'bhikāmikām /
padbhyāṃ yajñaḥ svayaṃ havyaṃ karmabhiḥ kriyate nṛbhiḥ //

25. When He thought of manifesting the state of voluntary locomotion the two legs (feet) were formed (became differentiated); and along with the feet Vishnu Himself called *yagna* appeared as the presiding deity; and the materials for sacrificial offerings are procured by means of action, (that is, the organ of physical motion came into existence, and by this organ men are able to move about and collect sacrificial materials.)