佛說目連問戒律中五百輕重事經 1.69

1.69

問：「比丘得比丘尼界裏宿不？」答：「得。亦不得失衣，但不得入其房內耳。」

Question: "May a bhikṣu spend the night in a bhikṣuṇī's sīmā?" Answer: "He may. He also does not lose his robes; he simply must not enter inside their rooms."