Answer:
This is a dish containing beans, sometimes baked but, despite the name, usually stewed, in a sauce
What always comes into the house through the keyhole?
Up on high I wave away but not a word can I say.
What leaps one time out of four?
You feel this sensation when you are dehydrated.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.