The works of Ādi Śaṅkarācārya

Bṛhadāraṇyakopaniṣadbhāṣyam

Verse 98

षां विसर्गाणां पायुरेकायनमेवँ सर्वेषा-मध्वनां पादावेकायनमेवँ सर्वेषां वेदा-नां वागेकायनम् ॥ ११ ॥

In plain words

...of everything the body ever excretes, the anus alone is where it all comes together and leaves. In the same way, of every road ever walked, the two feet are the single place where all journeys converge. And in the same way, of every Veda there is, speech is the one place where they all meet.

Close to the Sanskrit

...of all excretions, the anus is the single point of convergence; likewise, of all paths, the two feet are the single point of convergence; likewise, of all the Vedas, speech is the single point of convergence.