Abū al-Muʾthir, al-Ṣalt b. Khamīs al-Bahlawī al-ʿUmānī, was an Ibāḍī faqīh (jurist) in Oman during the 3rd/9th century. His Bahlawī nisba (designation of origin) comes from Bahlāʾ, a place near Nizwā. There is little information about his childhood and youth. For a while he studied under Abū ʿAbd Allāh Muḥammad b. Maḥbūb b. Raḥīl (d. 260/874) in Ṣuḥār, and was also taught by some other shaykhs of the time such as Abū Ziyād Waḍḍāḥ b. ʿUqba (see Ibn Jaʿfar, 1/229, 327; Abū Saʿīd al-Kadumī, al-Jāmiʿ, 1/17–18, 221; al-Kindī, Muḥammad, 4/189, 7/137; c…