The works of Ādi Śaṅkarācārya

Chāndogyopaniṣadbhāṣyam

Verse 288

यदादित्यस्य रोहितं रूपं तेजसस्तद्रूपंयच्छुक्लं तदपां यत्कृष्णं तदन्नस्यापागा-दादित्यादादित्यत्वं वाचारम्भणं विकारोनामधेयं त्रीणि रूपाणीत्येव सत्यम् ॥ २ ॥

In plain words

Whatever red form the sun wears belongs to fire; whatever white belongs to water; whatever dark belongs to earth. The very idea of the sun has fallen away from the sun. Name and transformation are merely spoken words; only the three elemental forms are real.

Close to the Sanskrit

Whatever is the red form of the sun, that is the form of fire; what is white, that is of water; what is black, that is of food. Sun-hood has departed from the sun. Speech-originated is the modification, a name; the three forms alone are truth.