（1） The five hundred arhats 阿罗汉 headed by Maha^ka^/syapa 摩诃迦叶， who assembled at the First Council 第一结集 held immediately after the death of the Buddha. （2） The five hundred arhats， headed by Pa^r/sva 胁尊者， who compiled the Vibha^s!a^-/sa^stra 毗婆沙论 at the Fourth Council 第四结集 held under the patronage of King Kanis!ka 迦腻色迦王.