- Jāmiʻ al-uṣūl li-aḥādīth al-Rasūl (Ibn al-Athīr, Majd al-Dīn al-Mubārak ibn Muḥammad)1
- Jāmiʻ al-ṣaghīr (Suyūṭī)1
- Karaites1
- Karaites--Liturgy1
- Karmī, Marʻī ibn Yūsuf, -1623 or 16241
- Karshuni1
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)1
- Khulāṣat al-ḥisāb (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)1
- Khuzāʻī, Diʻbil ibn ʻAlī, 765 or 766-860 or 861. Qaṣīdah1
- Knowledge, Theory of (Islam)1
- Kumayl ibn Ziyād, 633 or 634-7011
- Lectionaries1
- Legacies (Islamic law)1
- Libel and slander--Religious aspects--Islam1
- Liquor laws (Islamic law)1
- Literary style1
- Liturgical books1
- Liturgical poetry1
- Liturgies1
- Lumʻah al-Dimashqīyah (Shahīd al-Awwal, Muḥammad ibn Makkī)1