अथ होवाच बुडिलमाश्वतराश्विं वैयाघ्रपद्य कं त्वमात्मानमुपास्स इत्यप एव भगवो राजन्निति होवाचैष वै रयिरात्मा वैश्वानरो यं त्वमात्मानमुपास्से तस्मात्त्वंरयिमान्पुष्टिमानसि ॥ ५.१६.१ ॥
In plain words
Then he said to Buḍila Āśvatarāśvi, "Vaiyāghrapadya, what Self dost thou worship?" "The waters, O king," he said. He said, "The Self, Vaiśvānara, whom thou worshippest is wealth. Therefore thou art rich and well-nourished.
The commentators
Chāndogyopaniṣadbhāṣyam· bhāṣya
अथ ह उवाच बुडिलमाश्वतराश्विमित्यादि समानम् । एष वै रयिरात्मा वैश्वानरो धनरूपः । अद्द्भ्योऽन्नं ततो धनमिति । तस्माद्रयिमान् धनवान् त्वं पुष्टिमांश्च शरीरेण पुष्टेश्चान्ननिमित्तत्वात् ॥
In plain words
The passage starting with 'buḍilam āśvatarāśvim' is explained similarly. This water is indeed wealth, the self Vvaiśvānara, taking the form of riches. From water comes food, and from food comes wealth. Therefore you are wealthy, rich, and physically robust, because bodily thriving arises from food.
Close to the Sanskrit
The passage beginning with 'buḍilam āśvatarāśvim' is similar. This indeed is wealth, the self Vvaiśvānara, having the form of wealth. From waters comes food, then wealth. Therefore you are wealthy, rich, and nourished in body, because nourishment is caused by food.