- Hadith--Language, style1
- Hanbalites1
- Homosexuality--Religious aspects--Islam1
- Ibn Bābawayh al-Qummī, Muḥammad ibn ʻAlī, 918 or 919-991 or 992. Man lā yaḥḍuruhu al-faqīh1
- Ibn Saʻādah, Aḥmad ibn ʻAlī, active 13th century. Risālat al-ʻilm1
- Ibn Sharaf Shāh, Ḥasan ibn Muḥammad, 1247 or 1248-1315 or 1316. Wāfiyah fī sharḥ al-Kāfiyah1
- Ibn Wadʻān, Muḥammad ibn ʻAlī, d. 1101. Arbaʻīn al-Wadʻānīyah1
- Ibn al-Uqlīshī, Aḥmad ibn Maʻadd, -1155 or 11561
- Ibn al-ʻArabī, 1165-1240. Works1
- Imams (Shiites)1
- Intellectual life1
- Intention--Religious aspects--Islam1
- Iran1
- Islamic Empire1
- Islamic calendar1
- Islamic learning and scholarship1
- Islamic poetry, Arabic1
- Islamic sermons, Arabic1
- Jihad1
- Jumʻah1