The works of Ādi Śaṅkarācārya

Chāndogyopaniṣadbhāṣyam

Verse 116

तस्य ये प्राञ्चो रश्मयस्ता एवास्य प्राच्यो मधुनाड्यः ।ऋच एव मधुकृत ऋग्वेद एव पुष्पं ता अमृता आपस्ता वा एता ऋचः ॥ २ ॥

In plain words

Those eastern rays of the sun are its eastern honey-channels. The Rigvedic hymns are the bees, the Rigveda itself is the flower, and the waters are the immortal nectar. Truly, these are the Rig verses.

Close to the Sanskrit

Of that [sun], those rays which are eastward, they are indeed its eastern honey-channels. The Rig verses themselves are the honey-makers, the Rigveda is the flower, those waters are immortal. Indeed, these are the Rig verses.