“…It is not clear when Ibn al-Athīr managed to write his various works, including Jāmiʿ al-uṣūl. In this compilation the author combines the two Ṣaḥīḥs with four other collections, namely the Muwaṭṭaʾ of Mālik b. Anas and the || 40 On Ibn al-Baṭṭī, see al- Dhahabī, Siyar (1417/1996al-Ṣafadī, al-Wāfī (1381al-Ṣafadī, al-Wāfī ( -1425al-Ṣafadī, al-Wāfī ( /1962al-Ṣafadī, al-Wāfī ( -2004al-Ṣafadī, al-Wāfī ( ), 3: 209, no. 1196al-Dhahabī, Tārīkh al-islām (1410/1990 Sunan of al-Tirmidhī, Abū Dāwūd and al-Nasāʾī, which taken together constitute in his view the fundamental corpus of reliable traditions, generally accepted and used by fuqahāʾ and other scholars.…”