Tobias is the 17th book of the Bible and one of the historical books in the Old Testament. In the text, Raphael, after revealing his angelic nature, commanded both father and son to tell all the wonders that God had done to them and write it in a book. It is likely that the parts of the book written in first person singular are an autobiography of Tobias the elder. It was written originally during the Babylonian Exile, in the early portion of the seventh century B.C.; and that all except the last chapter was the work of Tobias the elder and his son.