四分律行事鈔資持記 2.1327

2.1327

七十。（佛在舍衛，跋難陀二沙彌共行不淨，便說欲不障道，佛令白四遙諫不捨，滅擯；六群誘將畜養因制。）

Seventy. (The Buddha was in Śrāvastī; two śrāmaṇeras of Upananda engaged in impure conduct together and said that sensual desires do not obstruct the path; the Buddha ordered a jñaptidvitīyā-karmavācanā to admonish them from afar, but they would not abandon it and were expelled; the ṣaḍvargikas enticed them, harbored and maintained them, so on this account it was prohibited.)