- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Maṭāliʻ al-anẓār1
- Iẓhār al-asrār (Birgivî Mehmet Efendi)1
- Jaʻbarī, Arslān ibn Yaʻqūb, -1300. Risālat al-tawḥīd1
- Jaʻbarī, Ibrāhīm ibn ʻUmar, 1242 or 1243-1331 or 1332. Wāḍiḥah fī tajwīd al-Fātiḥah1
- Jewish law--Interpretation and construction1
- Judaism--Liturgy1
- Judaism--Liturgy--Texts1
- Judeo-Persian literature1
- Judges (Islamic law)1
- Jāmī, 1414-1492. Risālah-i muʻammā1
- Jāmī, 1414-1492. Tafsīr al-fātiḥah al-sharīfah1
- Jīlī, ʻAbd al-Karīm ibn Ibrāhīm, 1365 or 1366- Risālat al-Tawḥīd1
- Kaffawī, Muḥammad ibn Ḥumayd, -1760 or 1761. Ādāb al-baḥth1
- Kalbī, Diḥyah ibn Khalīfah, -approximately 6701
- Karaite law1
- Karaites (Jewish law)1
- Karaites--Liturgy1
- Kavvanot (Cabala)1
- Kaʻb al-Aḥbār, -655 or 6561
- Kaʻbah (Mecca, Saudi Arabia)1