Book of Jasher (biblical References) - Biblical References

Biblical References

The book appears to be referenced from around the reign of David. 2 Samuel 1:18 states:

To teach the Sons of Judah the use of the bow; behold it is written in the Book of the Upright (Sēper haiYāšār).

David's lament for Jonathan immediately follows.

The Book of Joshua 10:13 states:

And the Sun stood still, and the Moon stayed,

until the people had avenged themselves on their enemies.

Is this not written in the Book of the Upright (Sēper haiYāšār)?

The presence of this event in a book of poetry has been interpreted as a poetic description of the prolonged battle.

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:

And he gave orders to teach it the sons of Iouda: behold it is written in the Book of the Just.

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) that this refer's to Joshua's renown after the miracle of the standing of the sun.