All right. I know I saw rules like this somewhere at one point. But weather it was in a d&d 3.5 book or what I can't remember and I occasional think those rules would be useful. And no search has been successful because the words Faith, Praying, Prayer and so on are used for everything Cleric or paladins use.
What I remember of the rules I saw goes something like this:
When ever you pray or hold a ceremony you gain a "Prayer point".
Depending on who and how many is praying, where and how the prayer is taking place you gain more or less "Prayer points".
These "prayer points" can then be used to gain different things from the god in question depending on its domains along with some genering gains. Every thing from a +1 blessing to one roll, to a year long increase to crop growth or a single spell.
What made this system interesting for me was that you did not need to be a spell caster class to gain the effekt of a spell. You just needed to be devoted to a god for a long time. A few farmers could pray for generations to something just so their blood line could get a special trait or blessing.
If some one could point me to the correct splat-book or source I would be most appreciative.
