I wouldn't say it's worth it. If it's for English literature, then you probably know quotes better than you think, and you will be able to think of them in the exam, as long as you have had sleep.
I'd say you have two good options though. Stay up a bit later and do some good quality revision before sleep, of wake up a couple of hours early and do revision then.
If you have a really good idea of what will come up, then focus most of your revision on that (not all though in case it's wrong).