"The Zoroastrians who remained in Persia (modern Iran) after the Arab–Muslim conquest (7th century AD) had a long history as outcasts. Although they purchased some toleration by paying the jizya (poll tax), not abolished until 1882, they were treated as an inferior race, had to wear distinctive garb, and were not allowed to ride horses or bear arms." Gabars, Encyclopædia Britannica. 2007. Britannica Concise Encyclopedia. 29 May 2007.
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Brems, E (2001). «Islamic Declarations of Human Rights». Human rights: universality and diversity: Volume 66 of International studies in human rights. Martinus Nijhoff Publishers. pp. 241–84. ISBN90-411-1618-4.
Rodwell, JM. The Koran. Phoenix. p. 342. ISBN978-1-84212-609-7. «This was the taunt of the jews of the tribe of Kainoka, when Muhammad demanded tribute of them in the name of God.»
