The works of Ādi Śaṅkarācārya

Chāndogyopaniṣadbhāṣyam

Verse 296

अन्नमयँ हि सोम्य मन आपोमयः प्राणस्तेजोमयी वागिति भूय एव मा भगवान्विज्ञापयत्विति तथा सोम्येति होवाच ॥ ४ ॥

In plain words

"Mind, dear one, is made of food, the life-breath of water, and speech of fire." Pray, revered father, explain this to me yet again. "So be it, my dear," he replied.

Close to the Sanskrit

"Mind, my dear, is made of food, breath is made of water, speech is made of fire"; let the revered one instruct me further still. Thus. "So be it, my dear," he said.