Sefer haYashar

Sefer haYashar (Hebrew ספר הישר "Book of the Upright One"). In English, Jashar was traditionally left untranslated and rendered Book of Jasher.

Biblical references

• Sefer haYashar (Biblical references), the book mentioned in Joshua 10:13 and 2Samuel 1:18.

Rabbinical treatises

• Sefer haYashar (Amoraim), a collection of sayings of the sages from the Amoraim period in Rabbi Zerahiah's Sefer Hayasher
• Sefer haYashar (Ibn Ezra), a commentary on the Pentateuch by the 12th-century Rabbi Abraham Ibn Ezra
• Sefer haYashar, by the Kabbalist and philosopher Rabbi Abraham Abulafia
• Sefer haYashar, Jacob ben Meir's 12th-century treatise on Jewish ritual and ethics
• Sefer haYashar of Zerahiah ha-Yevani, a moral treatise of the 13th century published as Ha-Yewani Zerahiah, Sefer Hayashar, The Book of the Righteous
• Sefer haYashar of Jonah ben Abraham, a 14th-century work by Rabbi Jonah ben Abraham of Gerona
• Sefer haYashar (midrash), a 16th-century book of Jewish legends covering the period from the creation of man to the first wave of the conquest of Canaan

Forgery

• Book of Jasher (Pseudo-Jasher), an 18th-century forgery by a London printer, Jacob Ilive

Fiction

• Book of Jashar by Benjamin Rosenbaum, a fictional translation of the supposed Book of Jasher mentioned in 2 Samuel.