- Samarqandī, Muḥammad ibn Yūsuf, -1160 or 1161. Fiqh al-nāfiʻ1
- Sanūsī, Muḥammad ibn Yūsuf, approximately 1427-approximately 1490. Muqaddimah1
- Sanūsī, Muḥammad ibn Yūsuf, approximately 1427-approximately 1490. Muqaddimāt1
- Sanūsī, Muḥammad ibn Yūsuf, approximately 1427-approximately 1490. ʻAqīdah al-ṣughrá1
- Saudi Arabia--Hejaz1
- Sayfī, Muḥammad ibn Muḥammad Mahdī, -1727 or 1728. Naẓm Zubdat al-uṣūl1
- Shamsīyah (Qazwīnī, ʻAlī ibn ʻUmar)1
- Sharḥ al-ʻAqāʼid al-ʻAḍudīyah (Dawwānī, Muḥammad ibn Asʻad)1
- Shādhilī, Abū al-Ḥasan ʻAlī ibn ʻAbd Allāh, approximately 1196-1258. Ḥizb al-baḥr1
- Shādhilīyah1
- Shāfiʻī, Muḥammad ibn Idrīs, 767 or 768-8201
- Shīrāzī, Shukr Allāh ibn Qāsim. Mufīd al-Mukhtaṣar1
- Shīʻah--Customs and practices1
- Sin--Islam1
- Smoking (Islamic law)1
- Solomon, King of Israel1
- Solomon, King of Israel, in the Qurʼan1
- Sufi chants1
- Sufis1
- Sufism--Doctrines1