Tobias and the Fish

In the Bible, the archangel Raphael appears to Tobias as a peasant, assisting him on his journey to collect a debt for Tobit, his blind father. On the journey, Raphael instructs Tobias to gut a fish which had attacked him and keep its heart, liver and gall. When Tobias reunites with his father, Raphael tells him to rub the gall on his father's eyes, which restores his eyesight.