From the volume Cities of the Plain (Sodom et Gomorrhe) in which our hero discuses the time of sleeping and the time of wakefulness.
Two times, I have said; perhaps there is only one after all, not that the time of the waking man has any validity for the sleeper, but perhaps because the other life, the life in which he sleeps, is not–in its profounder part–included in the category of time. I came to this conclusion when on the mornings after dinners at la Raspelière I used to lie so completely asleep. For this reason. I was beginning to despair, on waking, when I found that, after I had rung the bell ten times, the waiter did not appear. At the eleventh ring he came. It was only the first after all. The other ten had been mere suggestions in my sleep which still hung about me, of the peal that I had been meaning to sound. My numbed hands had never even moved. Well, on those mornings (and this is what makes me say that sleep is perhaps unconscious of the law of time) my effort to awaken consisted chiefly in an effort to make the obscure, undefined mass of the sleep in which I had just been living enter into the scale of time. It is no easy task; sleep, which does not know whether we have slept for two hours or two days, cannot provide any indication. And if we do not find one outside, not being able to re-enter time, we fall asleep again, for five minutes which seem to us three hours.