佛陀時代六師外道之一，主張徹底的懷疑論，教法因含糊其辭而被稱為「詭辯派」；舍利弗與大目犍連原本從其學法，後轉投佛陀門下。

One of the six well-known heretical teachers of the Buddha’s day, a thoroughgoing sceptic whose evasive teaching style became known as ‘eel-wriggling’; he was the original teacher of Sāriputta and Mahā-Moggallāna before they left him for the Buddha.