- Ibn Bābawayh al-Qummī, Muḥammad ibn ʻAlī, 918 or 919-991 or 992. Man lā yaḥḍuruhu al-faqīh2
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- Ibn Saʻādah, Aḥmad ibn ʻAlī, active 13th century. Risālat al-ʻilm2
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- Ibn al-Yāsamīn, ʻAbd Allāh ibn Ḥajjāj, d. 1204. Urjūzah2
- India--Bijāpur (Karnataka)2
- India--Surat2
- Inscriptions2
- Intention--Religious aspects--Islam2
- Interfaith relations2
- Iran--Mashhad2
- Iraq--Baghdad2
- Iraq--Dihōk2
- Isfarāyīnī, Muḥammad ibn Muḥammad, -1285. Ḍawʼ al-Miṣbāḥ2
- Islam--Theology2
- Islamic etiquette2
- Islamic stories2
- Italy--Rivarolo Ligure2
- Italy--Rome2
- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Tasdīd al-ʻaqāʼid fī sharḥ Tajrīd al-qawāʻid2