Oh no that must be awful for u

But it sounds like you've done the right thing with separating them.
&I agree with cc98 to put a bowl of water in instead of a bottle to drink out of. If he needs water at least he has access to it.
It might be worth having a look to see what damage has been done to both boys if any.
If the eyes are damaged or scratched in any way its best to see a vet-as eye problems are prone to complications if not treated asap.
If there are any wounds they may need antibiotics to stop infection &painkillers so they are more comfortable &dont lose their appetite.
Make sure they are comfortable, warm enough. Check their poop output &eating quantities.
They're probably in shock too after a full on fight-so try &keep them calm (&you

)talk to them softly & reassure them.
Definitely dont attempt to put them back together-it won't work.
I would definitely book a vet visit first thing or if there are bad eye injuries try ringing the emergency vet for advice if u have one?
Fingers &toes all crossed for their speedy recoveries.
Hopefully u can get some decent sleep too. Xx