How long should I keep a newly spayed cat away from other cats and activity?

two days to be safe :) hes not going to want to play anyhow they get all groggy and i think they still feel the pain even though they get that pink stuff...whats it called..amoxicillin?? don't remember clearly...anyhow i was feeling so bad for my kitty when he got spayed and cried a lot...and i called the vet like 5 times to make sure everything was okay. they're really nice about it though. don't let him lick the incisions!!!