Buddha says: Saha
The three thousand great thousand worlds are Saha, and this is Jambudvipa where I live.
The sentient beings in this world can endure the ten evils and all kinds of troubles without escaping.
A Buddhist Sutra, known as the source of all evil in the world
The inner demon is born from this. The ten evils and the five pleasures are mixed in the heart, and the blood is attached to it.
Humans and demons are transformed like this