of Mazyar learning of his secret communication with Shapur, asked him how he would react if Shapur converted to Islam and offered to become a client of the caliph. Mazyar gave no answer, but had Shapur beheaded the same day, which greatly angered Musa. Mazyar, fearful of the consequences of having Shapur killed without consensus, apologized to Musa.

Mazyar now began constructing mosques in several towns, and successfully plundered the territories of the Daylamites, and had a large number of them resettled