A comparison of the references to Muqatil B. Sulayman (150/767) in the exegesis of al-Tha'labi (427/1036) with Muqatil's own exegesis

Muqatil b. Sulayman's work is the oldest surviving exegesis which comments on the entire Qur'an from the beginning to the end. Analytical comparisons between different manuscripts of this exegesis and the quotations made by the exegetes, who greatly benefited from Muqatil, give us important information about the history of Quranic exegesis. al-Tha'labi's references to Muqatil offer valuable data illuminating the role of 'the changing contents' of the manuscripts in understanding the history of the exegesis. Changing evaluations and criticism about Muqatil's personality and his opinions show that the history of Quranic exegesis needs to be further critically studied.