। ॥ ५९५ ॥
In plain words
"In deep sleep there is nothing at all" — who told you that? What reason led you to infer it? How did you come to know it yourself? Say it.
Close to the Sanskrit
"In deep sleep there is void only" — thus, by which person was it uttered to you? By what reason was it inferred? How was it known by you? Let it be said.