Ikhtiyār maʿrifat al-rijāl (Arabic: اختیار معرفة الرجال), also known as the Rijāl al-Kashshī (Arabic: رجال الکَشّي), is a Twelver Shi'ite work of biographical evaluation (ʿilm al-rijāl) originally written by Muhammad ibn Umar al-Kashshi (c. 854–941/951) and abridged by Shaykh Tusi (995–1067 CE).
[5][verification needed] The abridged work as extant today contains 1115 hadiths and refers to 515 companions of the Shi'ite Imams.
The "Men" (Arabic: rijāl) in the title refers to early transmitters of hadith and other historical figures who knew the Shi'ite Imams.
Ibn Shahr Ashub referred to it as Maʿrifat al-nāqilīn ʿan al-aʾimma al-ṣādiqīn (Arabic: معرفة الناقلین عن الأئمة الصادقین), meaning "The Knowledge of Those Who Transmitted from the Sincere Imams".
[12] The work deals with the biographical evaluation (ʿilm al-rijāl) of a wide variety of early Muslim figures.