p. 212
नद्यः समुद्राश्च स एव सर्वं यदस्ति यन्नास्ति च विप्रवर्य ॥
In plain words
The rivers, the seas — he alone is all of it. Whatever exists and whatever does not, best of brahmins: that is he.
Close to the Sanskrit
The rivers and the oceans — he alone is all: that which is and that which is not, O best of brahmins.