At the city of Sāvatthī …
One day King Pasenadi went up to the Buddha, bowed respectfully, sat down to one side, and said to the Buddha, “Bhante, how many things arise inside a person for his harm, suffering, and discomfort?”
“Great king, three things arise inside a person for his harm, suffering, and discomfort. What three? Greed, hate, and delusion. These three things arise inside a person for their harm, suffering, and discomfort.”
The Buddha:
“Greed, hate, and delusion arise inside oneself; these evil thoughts harm that person. It is exactly like a tree destroyed by its own fruit.”1