Thus have I heard:
One time, the Budha was staying at Anaathapindidas Ashrama in Jetavana of Shraavastii.
At that time, Bhagavaan said to the Bhikshus, “In this assembly, I do not see a single practice that, when cultivated and frequently practiced, leads to rebirth in hell, as a hungry ghost, or as an animal. If one is reborn as a human, they will engage in adultery at home, lack purity in conduct, be ridiculed by others, and constantly face slander. What is this practice? It is sexual misconduct.”
Bhagavaan said to the Bhikshus, “If someone indulges in sexual misconduct without restraint and frequently violates others’ spouses, they will fall into hell, become a hungry ghost, or be reborn as an animal. If they are reborn as a human, their household will be filled with sexual immorality.
Therefore, Bhikshus, you should always maintain proper thoughts, avoid giving rise to lustful thoughts, and be careful not to engage in sexual misconduct. Thus, Bhikshus, you should train yourselves in this way.”
When the bhikshus heard what the Budha said, they followed it with joy.