Ekottaragama (Sanskrit fragments) 24.5.132

24.5.132

爾時，順水下流，有梵志，名江迦葉，在水側住。是時，江迦葉見呪術之具，盡為水所漂，便作是念：「咄哉！我大兄為水所溺？」是時，江迦葉將三百弟子，順水上流，求兄屍骸。遙見世尊在一樹下坐，及大迦葉五百弟子前後圍繞而為說法。見已，便前至迦葉所，而作是語：「此事為好耶？本為人師，今為弟子。大兄何故與沙門作弟子乎？」

They followed the river downstream to where the ascetic named Nadī Kāśyapa lived on the riverbank. Nadī Kāśyapa saw all their implements of magical incantation floating in the water. He then thought, “What? Did my older brother drown in the river?” Nadī Kāśyapa then led his 300 disciples upstream searching for his brother’s body. He saw the Bhagavān sitting under a tree from a distance, surrounded in front and behind by Great Kāśyapa and his 500 disciples. He said, “What’s the reason for this marvel? A man who was once a teacher now is a disciple! Why did my older brother become a disciple of that ascetic that he’s accompanying?”