Editing Isaiah Horowitz (section)

==Works==<!-- This section is linked from [[Tanya (Judaism)|Tanya]] -->
His most important work ''Shenei Luḥot HaBerit'' ({{langx|he|שני לוחות הברית}}, ''[[Ten Commandments#Written in Stone|Two Tablets]] of the Covenant'', abbreviated ''Shelah'' {{Script/Hebrew|של"ה}}), is an encyclopedic compilation of ritual, [[ethics]], and mysticism. It was originally intended as an [[ethical will]] - written as a compendium of the Jewish tradition. The title page of the first edition states that the work is "compiled from both [[Torah]]s, [[Chumash (Judaism)|Written]] and [[Oral Torah|Oral]], [[tradition|handed down]] from [[Biblical Mount Sinai|Sinai]]". The work has had a profound influence on Jewish life - notably, on the early Hasidic movement, including the [[Baal Shem Tov]]; [[Shneur Zalman of Liadi]] was described as a "''Shelah [[Yid]]''", and ''Shelah'' clearly echoes in his work, ''[[Tanya (Judaism)|Tanya]]''. The work was first published in 1648 by his son, [[Shabbethai Horowitz]], and has been often reprinted. An abbreviated form by [[Jehiel Michel Epstein (17th century)|Jehiel Michel Epstein]] appeared in 1683.<ref>{{Cite Jewish Encyclopedia|article=Jehiel N. Epstein|url=https://www.jewishencyclopedia.com/articles/5825-epstein#anchor5}}</ref> (See also [[:he:שני לוחות הברית (ספר)|שני לוחות הברית article]] in the [[Hebrew Wikipedia]]).

Horowitz also wrote the ''Sha'ar ha-Shamayim'' [[siddur]] (prayer book) which had an influence on the later Ashkenazi ''[[Nusach (Jewish custom)|nusach]]''.

===Tefillat HaShlah - The Shelah's Prayer===
Rabbi Horowitz wrote that the eve of the first day of the month of [[Sivan]] is the most auspicious time to pray for the physical and spiritual welfare of one's children and grandchildren, since [[Sivan]] was the month that the [[Torah]] was given to the Jewish people. He composed a special prayer to be said on this day, known as the ''Tefillat HaShlah'' "the Shelah's Prayer".<ref>{{cite web|url=http://www.hakolhayehudi.co.il/midrash/ערב-ראש-חודש-סיוון-תפילת-השלה-171|date=May 18, 2015|website=hakolhayehudi.co.il|language=he|script-title=he:ערב ראש חודש סיוון: תפילת השל"ה|trans-title=Eve of the First of the Month of Sivan: The Shelah's Prayer|access-date=Jan 11, 2017}}</ref> In modern times, the custom of saying this prayer on the appointed day has become very popular among [[Orthodox Judaism|Orthodox]] parents.