四分比丘戒本疏 1.35

1.35

第二、觸戒。淮律，二俱無衣相觸得殘，互有衣蘭，俱有衣吉羅。髮爪猶是身分，故殘也。若准《善見》髮髮相觸、抓抓相觸但得蘭罪，俱無覺故；互覺即殘，如戒文說。《僧祇》第五云「女人者，謂母女姊妹、親里非親里、若大若小、在家出家，皆犯。」准律，死女多未壞者，觸亦犯殘。

The second is the precept on physical contact. According to the Vinaya, if both are unclothed and touch each other, it incurs a saṃghāvaśeṣa; if one has clothing and the other does not, a sthūlātyaya; if both have clothing, a duṣkṛta. Hair and nails are still parts of the body, so they incur a saṃghāvaśeṣa. According to the Samantapāsādikā, hair touching hair or nail touching nail incurs only a sthūlātyaya, because neither has sensation; if one has sensation, it is a saṃghāvaśeṣa, as stated in the precept text. The fifth chapter of the Mahāsāṃghika[-vinaya] states: "'Woman' refers to mother, daughter, sister, relatives, non-relatives, elder or younger, lay or ordained—all incur a transgression." According to the Vinaya, touching a deceased woman who is mostly undecomposed also incurs a saṃghāvaśeṣa.