424 in Persia Isdegerdes, son of Sapor III, put a stop to the cruel persecution against the Christians in Persia, which had been begun by Sapor II, and the church had enjoyed twelve years' peace in that kingdom when, in 420, it was disturbed by the indiscreet zeal of one Abdas, a Christian bishop, who burned down the Pyraeum, or temple of fire, the great divinity of the Persians. King Isdegerdes threatened to demolish all the churches of the Christians unless he would rebuild it. Abdas had done ill in destroying the temple, but did well in refusing to rebuild it; for nothing can make it lawful to contribute to any act of idolatry, or to the building a temple, as Theodoret observes. Isdegerdes therefore demolished all the Christian churches in Persia, put to death Abdas, and raised a general persecution against the church, which continued forty years with great fury. Isdegerdes died the year following, in 421. But his son and successor, Varanes, carried on the persecution with greater inhumanity. The very description which Theodoret, a contemporary writer, and one that lived in the neighbourhood, gives of the cruelties he exercised on the Christians strikes us with horror: some were flayed alive in different parts of the body, and suffered all kinds of torture that could be invented: others, being stuck all over with sharp reeds, were hauled and rolled about in that condition; others were tormented divers other ways, such as nothing but the most hellish malice was capable of suggesting. Amongst these glorious champions of Christ was St. Benjamin, a deacon. The tyrant caused him to be beaten and imprisoned. He had lain a year in the dungeon when an ambassador from the emperor obtained his enlargement on condition he should never speak to any of the courtiers about religion.
Edited from Butler's Lives of the Saints