Sinbad was a Zoroastrian priest from a village near Nishapur (on the right) in Khorasan. After the murder of his close friend and famous General, Abu Muslim, Sinbad started a rebellion against the Abbasid rule.

Sinbad claimed that Abu Muslim never died but flew away as a white dove before his execution. Sinbad’s movement which was known as Khorram Dinan (those of joyous religion), gained support among many Zoroastrians and his uprising spread to Rayy (near Tehran) and Herat. However, eventually, Sinbad was captured and executed.