- Fatḥ al-Wahhāb bi-sharḥ Manhaj al-ṭullāb (Anṣārī, Zakarīyā ibn Muḥammad)5
- Firmans5
- God (Islam)--Worship and love5
- God--Proof, Ontological5
- Hurufis5
- Hymns5
- Ibn Bābawayh al-Qummī, Muḥammad ibn ʻAlī, 918 or 919-991 or 992. Man lā yaḥḍuruhu al-faqīh5
- Ibn al-Muṭahhar al-Ḥillī, al-Ḥasan ibn Yūsuf, 1250-1325. Tahdhīb al-wuṣūl ilá ʻilm al-uṣūl5
- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjaz fī al-ṭibb5
- Ibn al-Sāʻātī, Aḥmad ibn ʻAlī, 1254-1294 or 1295. Majmaʻ al-baḥrayn5
- Ibn Ḥajar al-ʻAsqalānī, Aḥmad ibn ʻAlī, 1372-1449. Nuzhat al-naẓar fī tawḍīḥ Nukhbat al-fikar5
- Illumination of books and manuscripts, Arab5
- Ink stamps5
- Insertions (Provenance)5
- Interest (Islamic law)5
- International relations5
- Iraq5
- Isfarāyīnī, Muḥammad ibn Muḥammad, -1285. Ḍawʼ al-Miṣbāḥ5
- Islamic astrology5
- Islamic funeral rites and ceremonies5