And lending from your brows a gleam Of glory to the lovely stream. Who are you, say, so brave and fair, Clad in the bark which hermits wear? I see you heave the frequent sigh, I see the deer before you fly.

In plain words: Hanuman says their faces make the river look even more beautiful. He asks who they are, dressed in hermit's bark clothes, and notes that they sigh often as if in sorrow.