僧羯磨 1.156

1.156

不得身相觸乃至共畜生。若比丘尼染污心，與染污心男子身相觸，腋已下，膝已上，若摩、若捺、逆摩、順摩、若牽、若推、若舉、若下、若捉、若急捺；彼非比丘尼，非釋種女。汝是中盡形壽不得犯，能持不？（答言：）能。

"You must not engage in physical contact, even with an animal. If a bhikṣuṇī, with an impure mind, has physical contact with a man who has an impure mind, below the armpits and above the knees—whether rubbing, pressing, rubbing upwards, rubbing downwards, pulling, pushing, raising, lowering, gripping, or tightly pressing—she is not a bhikṣuṇī, not a daughter of the Śākyas. In this, to the end of your life you must not commit violation. Are you able to maintain it?" (She replies:) "I am able."