分別功德論 4.10

4.10

The reason why Nadī-Kāśyapa is declared foremost is that when the Buddha preached the Dharma for him, he listened with a focused mind, his concentrated attention penetrating the spirit; all fetters melted away, and true virtue was replete within, reaching his very bones and marrow, so that marrow and fat flowed outwards, resembling perspiration. By this account, his mind was tranquil and able to conquer all fetters; therefore he is declared foremost.