3. *Al-ʿIlal al-Kabīr* — one of his important and beneficial works, in which he included discussion of the defects (ʿilal) of hadiths, based on what he asked his teachers — Muhammad ibn Ismāʿīl al-Bukhārī, Abū Zurʿah al-Rāzī, and ʿAbd Allāh ibn ʿAbd al-Raḥmān al-Dārimī — about them. Most of it is from al-Bukhārī, some of it from Abū Zurʿah and al-Dārimī, and a portion contains his own statements. As authored by al-Tirmidhī, it is lost; what exists is only in the arrangement of the jurist of his era in the science of legal disagreement, Judge Abū Ṭālib Maḥmūd ibn ʿAlī al-Aṣfahānī al-Shāfiʿī, who died in the year 585 AH. He arranged it according to jurisprudential chapters, and it came to comprise 428 chapters. It has been printed, edited by Professor Ḥamzah Dīb Muṣṭafā, and published by Maktabat al-Aqṣā in Amman in the year 1406 AH.

4. *Tasmiyat Aṣḥāb Rasūl Allāh* (The Naming of the Companions of the Messenger of God, peace and blessings be upon him) — printed, edited by Professor ʿImād al-Dīn Aḥmad Ḥaydar, at Dār al-Jinān in Beirut in the year 1406 AH.

5. *Al-Shamāʾil al-Nabawiyyah* — printed in more than one edition, and it has numerous commentaries exceeding forty, some of which are printed. Fuʾād Sezgin has mentioned them in his *Tārīkh al-Turāth al-ʿArabī* (History of the Arabic Heritage), so let it be consulted.

Several scholars have mentioned a number of books by Imam al-Tirmidhī that have not reached us, and we do not know whether they are preserved in some libraries in the world or whether they are among what has been lost and perished. Among them are the book *Al-Zuhd* (Asceticism), the book *Al-Tārīkh* (History), *Al-Asmāʾ wa al-Kunā* (Names and Epithets), *Al-Tafsīr* (Exegesis), *Al-Rubāʿiyyāt* (Quatrains), and a book on *Al-Āthār al-Mawqūfah* (Stopped Traditions).