<P> The Septuagint translation renders sefer hayashar in both cases as' Book of the Just' . The reference to the bow is here missing, so that the text reads: </P> <Dl> <Dd> And he gave orders to teach it the sons of Iouda: behold it is written in the Book of the Just . </Dd> </Dl> <Dd> And he gave orders to teach it the sons of Iouda: behold it is written in the Book of the Just . </Dd> <P> According to the Medieval Jewish scholar Rashi, Sefer HaYashar refers to the Pentateuch, as a fulfillment of Jacob's prophecy regarding Ephraim--"His seed will fill the nations" (Gen. 48: 19)--and that this prophecy refers to Joshua's renown after the miracle of the standing of the sun . </P>

Where did the book of jasher come from