四分律行事鈔資持記 2.491

2.491

四中。引《善見》。觸該五聚，唯無提舍。夷者，舊云淫是內觸，或可尼觸結重。殘及蘭吉，竝見上文。指觸提者，擊攊他也。

Under the fourth: citing the Samantapāsādikā. Touch covers five classes [of offenses], lacking only pāṭidesanīya. A pārājika: traditionally it is said that sexual intercourse is internal touch, or perhaps a bhikṣuṇī's touch constitutes a heavy [offense]. Saṃghāvaśeṣa, thullaccaya, and duṣkṛta are all seen in the text above. Touching with fingers incurring a pāyattika means tickling another.