Known as Uposatha-kumāra. The eldest of the ninety-nine brothers of Saṃvara, king of Bārāṇasī. When Saṃvara ascended the throne, his brothers protested and laid siege to his city; but Uposatha, having discovered by means of questions put to Saṃvara, that he was in character by far the best suited for kingship, persuaded the others to renounce their claims to the throne.

Uposatha is identified with Sāriputta. J.iv.133 ff.