आदित्य इति होवाच सर्वाणि ह वा इमानि भूतान्यादित्यमुच्चैः सन्तं गायन्ति सैषा देवतोद्गीथमन्वायत्ता तां चेदविद्वानुदगास्यो मूर्धा ते व्यपतिष्यत्तथोक्तस्य मयेति ॥ १.११.७ ॥
In plain words
"The sun," he said. "For all these beings sing of the sun when it stands on high. This is the deity that belongs to the Udgītha. If thou hadst sung the Udgītha without knowing it, thy head would have fallen off, since I had told thee so."
The commentators
Chāndogyopaniṣadbhāṣyam· bhāṣya
पृष्ट आदित्य इति होवाच । सर्वाणि ह वा इमानि भूतानि आदित्यम् उच्चैः ऊर्ध्वं सन्त गायन्ति शब्दयन्ति, स्तुवन्तीत्यभिप्रायः, उच्च्छब्दसामान्यात्, प्रशब्दसामान्यादिव प्राणः । अत सैषा देवतेत्यादि पूर्ववत् ॥
In plain words
When asked, he replied: The sun. All these beings exist on high and sing to the sun—meaning they praise it, owing to the shared sense of elevation, much like prāṇa. Therefore, this deity is to be understood as explained before.
Close to the Sanskrit
Asked, 'It is the sun', he said. All these beings, being high above, sing to the sun, they make sound, the intent is they praise, due to the similarity of high sound, like the prāṇa from the similarity of pra. Hence this deity and so on as before.