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'''Sahl ibn Bishr al-Israili''' (c. 786–c. 845), also known as '''Rabban al-Tabari''' and '''Haya al-Yahudi''' ("the Jew"), was a [[Syriac Christian]]<ref name="Prioreschi2001">{{cite book|last=Prioreschi|first=Plinio|title=A History of Medicine: Byzantine and Islamic medicine|url=https://books.google.com/books?id=q0IIpnov0BsC&pg=PA223|accessdateaccess-date=29 December 2014|date=2001-01-01|publisher=Horatius Press|isbn=9781888456042|page=223|quote=Ali ibn Sahl Rabban al-Tabari, the son of a Syriac Christian scholar living in Persia on the Caspian Sea...}}</ref><ref>{{cite journal|last=Meyerhof|first=Max|volume=16|issue=1|date=July 1931|pages=7–8|title=Alî at-Tabarî's "Paradise of Wisdom", one of the oldest Arabic Compendiums of Medicine|journal=Isis|quote={{smallcaps|Ibn al-Qiftî}} (4) renders the title ''Rabban'' correctly but with a false explanation, taking it for the Jewish title of ''Rabbi''. So {{smallcaps|'Alî b. Rabban}} passed into all historical works, until quite recently, as a Muslim of Jewish origin, although {{smallcaps|'Alî}} himself, in the preface to his work, explains this title ''Rabban'' as being the Syriac word for «our Master» or «our Teacher». The late Professor {{smallcaps|Horovitz}} told me and wrote to me several years ago, that this was a Christian title; {{smallcaps|A. Mingana}} gave the proof of this in print for the first time in I922. {{smallcaps|'Alî}} says in his apologetic tract «The Book of Religion and Empire» which he wrote about 855 A.D. that he himself was a Christian before he was converted to Islam, and that his uncle {{smallcaps|Zakkâr}} was a prominent Christian scholar.|jstor=224348|doi=10.1086/346582}}</ref> [[astrologer]],<ref>{{cite web|url=http://www.myjewishlearning.com/beliefs/Issues/Magic_and_the_Supernatural/Practices_and_Beliefs/Astrology/Medieval.shtml?p=1|title=Astrology in Medieval Judaism - My Jewish Learning|access-date=29 December 2014|url-status=dead|archive-url=https://web.archive.org/web/20141229230854/http://www.myjewishlearning.com/beliefs/Issues/Magic_and_the_Supernatural/Practices_and_Beliefs/Astrology/Medieval.shtml?p=1|archive-date=29 December 2014|df=}}</ref> [[astronomer]] and [[mathematician]] from [[Tabaristan]]. He was the father of [[Ali ibn Sahl Rabban al-Tabari|Ali ibn Sahl]] the famous scientist and physician, who became a convert to Islam.<ref>Meyerhof (1931), p. 7.</ref>
He served as astrologer to the governor of [[Khuristan]] and then to the [[vizier (Abbasid Caliphate)|vizier]] of [[Baghdad]]. He wrote books on astronomy, astrology, and arithmetic, all in Arabic.<ref>{{cite encyclopedia|editor-first=Norman|editor-last=Roth|title=Medieval Jewish Civilization: An Encyclopedia|publisher=Routledge|location=New York|year=2003|isbn=978-0-415-93712-2|url=https://books.google.com/books?id=eUp9OcCi-1EC|page=385}}</ref>
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