Shapur (Persian: شاپور یکم) was the seventh ruler of the Bavand dynasty, who ruled briefly in 825.
Shapur, knowing that Mazyar planned to have him killed, sent a secret message to the Abbasid governor of Tabaristan, Musa ibn Hafs, willing to pay him 100,000 dirhams if he would assert him as his own prisoner.
Musa responded by saying his best shot would be by converting to Islam and become a client of the caliph.
Mazyar gave no answer, but had Shapur beheaded the same day, which greatly angered Musa.
[1] This biography of an Iranian ruler or member of a royal family is a stub.