The works of Ādi Śaṅkarācārya

Bṛhadāraṇyakopaniṣadbhāṣyam

Verse 63

अथ कर्मणामात्मेत्येतदेषामुक्थमतोहि सर्वाणि कर्माण्युत्तिष्ठन्त्येतदेषा साममैतद्धि सर्वैः कर्मभिः सममेतदेषां ब्रह्मै-तद्धि सर्वाणि कर्माणि बिभर्ति तदेतत्र-

In plain words

Now, regarding actions: the Self is their foundation. From this, all actions arise. This is their harmony, coextensive with every deed. This is their absolute reality, which sustains all action.

Close to the Sanskrit

Now, of actions, the Self is this their uktha; because from this all actions rise up; this is their sāman; this indeed is equal with all actions; this is their brahman; this indeed supports all actions; that this...