So Tobias and the angel started out toward Media, taking Tobias' dog along with them. They walked on until sunset, then camped by the Tigris River. and the angel called to him, "Grab that fish! Don't let it get away."
Then Tobias grabbed the fish and dragged it up on the bank.
"Cut the fish open," the angel instructed, "and take out its gall bladder, heart, and liver. Keep these with you; they can be used for medicine, but throw away the guts."
Then Tobias asked, "Azarias, my friend, what diseases can be cured by this gall bladder, heart, and liver?"
The angel answered, "The heart and liver can be burned and used to chase away a demon or an evil spirit that is tormenting someone. The attacks will stop immediately, and the person will never be troubled again. You can use the gall bladder to treat someone whose eyes are covered with a white film. Just rub it on his eyes and blow on the film, and he will be able to see again." http://bible.us/Tob6.1.GNTD
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