The works of Ādi Śaṅkarācārya

Chāndogyopaniṣadbhāṣyam

Verse 12

अथ ह मन उद्गीथमुपासाञ्चक्रिरे तद्धासुराः पाप्मना विविधुस्तस्मात्तेनोभय५

In plain words

Then they chose the mind for their udgitha meditation. The demons pierced it with evil. And so through the mind both...

Close to the Sanskrit

Now, indeed, they meditated upon the mind as the udgitha. That, indeed, the demons pierced with evil. Therefore by it both...