Jasher

Jashar was an ancient Hebrew book mentioned in the Old Testament, but not included in the biblical canon.

Jashar, also known as the "Book of Jashar" or the "Book of the Upright," is mentioned twice in the Old Testament (Jos 10:13 and 2Sa 1:18). It appears to have been an ancient Hebrew collection of poetry or historical accounts that was known to the authors of the biblical texts. In Jos 10:13, the book of Jashar is referenced in connection with the miraculous event of the sun and moon standing still during Joshua's battle against the Amorite kings. In 2Sa 1:18, David's lament over the deaths of Saul and Jonathan is said to be written in the Book of Jashar. These references suggest that the Book of Jashar was a recognized source of poetry and historical information, although the book itself is not included in the biblical canon. The exact content and date of the Book of Jashar are unknown, and no copies of the book have been discovered.

Upright. “The Book of Jasher,” rendered in the LXX. “the Book of the Upright One,” by the Vulgate “the Book of Just Ones,” was probably a kind of national sacred song-book, a collection of songs in praise of the heroes of Israel, a “book of golden deeds,” a national anthology. We have only two specimens from the book, (1) the words of Joshua which he spake to the Lord at the crisis of the battle of Beth-horon (Josh. 10:12, 13); and (2) “the Song of the Bow,” that beautiful and touching mournful elegy which David composed on the occasion of the death of Saul and Jonathan (2 Sam. 1:18-27).