Editing Sefer haYashar (Rabbeinu Tam)

{{Short description|Treatise on Jewish ritual authored by Rabbeinu Tam}}
'''Sefer HaYashar''' ({{langx|he|ספר הישר}}, the ''Book of the Upright'') is a famous treatise on Jewish ritual authored by [[Rabbeinu Tam]] (Rabbi Jacob ben Meir, 1100–1171).<ref>{{cite web|url=https://www.virtualjudaica.com/Listing/Details/195686/Rabbenu-Tam-Sefer-haYashar-The-Book-of-Righteousness-ספר-הישר-Grodno-ברוך-בן-יוסף-1797  |title=Rabbenu Tam, Sefer ha-Yashar (The Book of Righteousness)|author=<!--Not stated-->|date=October 23, 2012|website=Virtual Judaica |publisher=|access-date=2024-07-07|quote=}}</ref> The work, which survives in a somewhat incomplete and amended form, was printed in [[Venice]] in 1544 and reprinted in [[Vienna]] in 1811.

It is especially concerned with reconciling apparently contradictory decisions in different sections of the [[Talmud]] and with preserving Talmud text unchanged against those who wanted to make clever emendations.

This ''Sefer ha-Yashar'' was used a great deal by later Talmudists and introduced the form of literature called ''[[Tosafot]]'' 'Additional Notes'.

==Editions==
* ''Sefer ha-yashar'' (Vienna, 1811).
* ''Sefer ha-yashar le-rabenu Tam'', ed. Simon Solomon Schlesinger (Jerusalem, 1959).  Critical edition of first section (''novellae'' = Hebr. ''hiddushim'').
* ''Sefer ha-yashar'', ed. Ferdinand Rosenthal (Berlin, 1898; repr. Jerusalem, 1975).  Critical edition of second section ([[responsa]]).

== References ==
{{reflist}}

==External links==
*[http://www.jewishencyclopedia.com/view.jsp?artid=74&letter=J#170 Jewish Encyclopedia: Jacob ben Meïr Tam: The "Sefer ha-Yashar."]

[[Category:12th-century books]]
[[Category:Rabbinic legal texts and responsa]]
[[Category:Jewish medieval literature]]
[[Category:Treatises]]

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