净饭王一位大臣之子，与佛陀同日出生并自幼为其玩伴，出家证阿罗汉果后劝请佛陀返回迦毘罗卫探望亲族，被誉为令家族生欢喜心第一人。

The son of one of Suddhodana’s ministers, born on the same day as the Buddha and raised as his playmate, who after attaining Arahantship persuaded the Buddha to visit his kinsmen at Kapilavatthu and was declared foremost among monks in gladdening families with the Dhamma.