菩薩戒本疏 1.46

1.46

若佛子！自婬、教人婬，乃至一切女人不得故婬，婬因、婬緣、婬法、婬業，乃至畜生女、諸天鬼神女及非道行婬。而菩薩應生孝順心，救度一切眾生，淨法與人，而反更起一切人婬，不擇畜生乃至母女、姉妹、六親行婬，無慈悲心者，是菩薩波羅夷罪。

"Disciples of the Buddha! If one engages in sexual misconduct oneself, teaches others to engage in sexual misconduct, down to not intentionally engaging in sexual misconduct with any woman; the causes of sexual misconduct, the conditions of sexual misconduct, the methods of sexual misconduct, and the acts of sexual misconduct; down to female animals, female deities, female ghosts and spirits, as well as engaging in sexual misconduct in non-orifices. Whereas a bodhisattva should generate a mind of filial compliance, rescue and liberate all sentient beings, and confer pure Dharma upon people, if instead one engenders sexual misconduct with all people, indiscriminately engaging in sexual misconduct with animals, or even with one's mother, daughter, sister, and the six relations, lacking a compassionate mind, this is a bodhisattva parājika offense."