The works of Ādi Śaṅkarācārya

Chāndogyopaniṣadbhāṣyam

Bhashya

Bhashya

जनपदं यं क्षेत्रभागं तं तमेवोपजीवन्ति ॥

In plain words

Whatever region or land they desire, upon that very land they subsist.

Close to the Sanskrit

Whichever region or parcel of land, upon that very one indeed they subsist.