The works of Ādi Śaṅkarācārya

Chāndogyopaniṣadbhāṣyam

Verse 14

तेन त५ ह बृहस्पतिरुद्गीथमुपासाञ्चक्रएतमु एव बृहस्पति मन्यन्ते वाग्घि बृह-ती तस्या एष पति' ॥ ११ ॥

In plain words

By that very means Brihaspati worshipped the Udgitha. People consider him alone to be Brihaspati, because speech is vast and he is its lord.

Close to the Sanskrit

By that indeed Brihaspati worshipped the Udgitha. They think this very one to be Brihaspati, for speech is vast, and he is the lord of that.