The works of Ādi Śaṅkarācārya

Chāndogyopaniṣadbhāṣyam

Verse 67

तस्मै श्वा श्वेत प्रादुर्बभूव तमन्येते ह यथैवेदं बहिष्पवमानेन स्तोष्यमाणा सर्रब्धा सर्पन्तीत्येवमाससृपुस्ते ह समुपविश्य हि चक्रुः ॥ ४ ॥

In plain words

A white dog appeared before him. Other dogs came up to it, and just as priests about to chant the outer pavamāna stotra move along holding onto one another, so did these dogs move forward, and sitting down together, they performed the chant.

Close to the Sanskrit

To him a white dog appeared. Those others indeed, just as here people about to praise with the outer pavamāna stotra move linked together, so they crawled and having sat down together made [the sound].