Is there any source that says that a god can not directly appear on Golarion? We were talking about some bad guys in the Golarion history and I was wondering, why e.g. Torag did not just appear and clash the whispering tyrant. One of our players said that this is not possible since the gods have an agreement that they do not directly interfere. But he could not remember the source.
I have looked for something like this in the books but could not find anything. Can anyone of you confirm this (with a source)?