He belonged to a brahmin family of Sumsumāragiri and entered the Order, after hearing the Buddha preach in Bhesakalāvana. One fast day, while seated where the Pātimokkha was being recited, he pondered on the advantages to be gained by the confession of faults, and uttered eagerly, "How utterly pure is the teaching of the Buddha." Thus expanding insight he attained arahantship. Later, reviewing his life, he admonished his colleagues. Thag.vss.447-52; ThagA.i.462f.