As a disciple of the Buddha, I must not engage in licentious acts or encourage others to do so. I must not have sexual relations with any persons, be they human, animal, divine, or spiritual, nor create the causes, conditions, methods, or karma for such misconduct. Indeed, I must not engage in improper sexual conduct with anyone.
As the Buddha’s disciple, I must have a mind of filial piety, rescuing all sentient beings and instructing them in the Dharma of purity and chastity. If instead, I lack compassion and encourage others to engage in sexual relations promiscuously, including with animals and even their mothers, daughters, sisters, or other close relatives, I commit a major offense.
—Brahma Net Sutra, Bodhisattva Vows