Pratimoksha of the Dharmaguptakas 1.17

1.17

「若比丘！共比丘同戒，若不還戒，戒羸，不自悔，犯不淨行，乃至共畜生。是比丘波羅夷，不共住。

If a monk holding the precepts and agreeing there with, without leaving the community, act in opposition to the precepts, and repent not, wickedly practising all sorts of impure conduct, till he come to live in common with the brute beasts, this monk shall be excluded and cut off from the assembly.