तद्वान् वेगवान्, 'अनेजदेकं मनसो जवीयः' इति श्रुतेः ।संहारसमये विश्वमश्नातीति अमिताशनः ॥
In plain words
That speed is his, so he is Vegavān, the Swift One — and the śruti says it plainly: unmoving, one, swifter than mind. When dissolution comes he eats the whole universe; so he is Amitāśana, whose eating has no measure.
Close to the Sanskrit
Possessing that, He is Vegavān — because of the śruti, 'unmoving, one, swifter than the mind.' At the time of dissolution He consumes the whole universe; thus, Amitāśana.