出身舍衛城富裕人家的比丘，被佛陀譽為禪修第一，因早年對戒律細節反覆遲疑而被稱作「疑惑者 Revata」。

A monk from a wealthy Sāvatthi family, declared by the Buddha chief among those who practised absorption (jhāna), known as ‘Revata the Doubter’ for his early scrupulousness about monastic rules.