Tobit 6:6-8

New Catholic Bible

⁶ The youth cut the fish up and set aside the gall, heart, and liver. He broiled and ate part of the fish, salting the rest so that it could be used on the journey. Afterward they continued their travels together until they drew near to Media.

⁷ Then the youth posed this question to the angel: “Brother Azariah, what medicinal value can there be in the heart, liver, and gall of the fish?” ^8 [a]He replied, “As far as the heart and liver are concerned, when you burn them and the smoke rises in the presence of someone, man or woman, who is afflicted by a demon or an evil spirit, that affliction will disappear for good and will never plague that person again.