Abu Yunis Sinbuya Asvāri (Persian: سنبویه اسواری) was the originator of the idea of Qadariyah, the doctrine of free-will in Islam. He was a Persian who was put to death by the Umayyad caliph Abd al-Malik, or, according to other narratives, by al-Hajjaj bin Yusuf. His idea was already taught in Damascus at the end of the seventh century of our era by Ma'bad al-Juhani (died in A.D. 699), who had imbibed the doctrine from Sinbuya.[1]
Sinbuya was one of the 'Asvaran' (the Sassanian Elite cavalry), stationed in Basrah. His name is also attested as 'Sinsuyah'. Sinbuyah was married to 'Umm Musa'[2]