al-Istibsar (Arabic: ٱلِٱسْتِبْصَار فِيمَا ٱخْتُلِفَ مِن ٱلْأَخْبَار, romanized: al-Istibṣār fī-mā ukhtulifa min al-Akhbār, lit.

it was compiled by Persian scholar al-Tusi It includes the same subjects as Tahdhib al-Ahkam (Rectification of the Statutes) but in a shorter form.

The greatest personality of this period was al-Shaykh al-Mufid who resided in the Shia neighborhood of Karkh in an opulent atmosphere.

[4] Two authoritative Shia resources, Tahdhib al-Ahkam and Al-Istibsar, were written by Shaykh al-Tusi.

[6] Sayyid Murtada Alam al-Huda (Sharif al-Murtaza) wrote some works on an Imamate called al-Shafi.

It was written as a response to the section on Imamte of Mutazili Qadi Abd al-Jabbar’s al- Mughni.