- Qurʼan. Sūrat Hūd1
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- Repentance--Islam1
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- Riddles, Arabic1
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- Rifāʻī, Aḥmad ibn ʻAlī, 1106?-11821
- Right of property (Islamic law)1
- Romania1
- Salutations--Religious aspects--Islam1
- Samarqandī, Abū al-Qāsim ibn Abī Bakr, active 15th century. Risālah al-Samarqandīyah1
- Samarqandī, Muḥammad ibn Ashraf, active 13th century. Ashkāl al-taʼsīs1
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- Selim II, Sultan of the Turks, 1524-15741
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