四分律比丘含注戒本 2.645

2.645

(The Buddha was in Śrāvastī. Two śrāmaṇeras of Upananda engaged in impurity together, claiming for themselves: "We have heard the Dharma from the Buddha: engaging in sexual desire is not an obstacle to the Path." The bhikṣus raised the fault, and the Buddha ordered that an admonition be delivered with a formal motion with three announcements; when they would not abandon it, they were completely expelled. The group of six enticed them and kept them. The bhikṣus raised the fault, and the Buddha rebuked them, formulating the precept accordingly.)