四分律刪繁補闕行事鈔 2.117

2.117

初不定中，四緣犯之：一是屏處，二是女人，三無第三人，四隨所作，犯。《四分》：女人者，人女有智命未終也。獨者，一比丘一女人。在屏處者，有二種：一者見屏，若塵霧若黑闇中，不相見也；二者聞屏，乃至常語不聞聲處。覆處者，上有蓋也。障處者，若樹牆壁籬，若衣及餘障也。可作淫處者，得容行淫處。《僧祇》云：若母女姊妹、親里非親里、若老若少、在家出家，是女人也。設有餘人，若眠、若狂、嬰兒等，悉名為獨。《善見》云：見聞屏者，謂無眼者、聾者、睡者，及多女人是也。如上諸緣，並是犯位，廣如前篇。

Under the first undetermined rule, it is incurred through four conditions: first, being in a secluded place; second, with a woman; third, with no third person present; and fourth, an offense is incurred according to what is done. The Dharmaguptaka Vinaya states: '"Woman" means a human female endowed with discernment whose life has not ended. "Alone" means one bhikṣu and one woman. "In a secluded place" is of two kinds: first, secluded from view, such as in dust, fog, or darkness where they cannot see each other; second, secluded from hearing, down to a place where ordinary speech cannot be heard. "Covered place" means covered above. "Screened place" means trees, walls, fences, robes, or other screens. "Place suitable for sexual intercourse" means a place roomy enough to carry out intercourse.' The Mahāsāṃghika-vinaya states: 'Whether mother, daughter, sister, relative, non-relative, elderly, young, lay, or monastic, all are "women." Even if another person is present, if sleeping, insane, or an infant, it is entirely called "alone."' The Samantapāsādikā states: '"Secluded from sight and hearing" refers to the blind, deaf, sleeping persons, and multiple women.' The conditions above all constitute grounds for offense, as detailed in the previous section.