These are what are called “dhamma niyāmatā.”
- A Sotapanna WILL attain Arahanthood within seven bhava.
- A Sakadagami WILL be born in kāma loka only once (in a Deva realm.)
- An Anāgāmi WILL attain Arahanthood in the suddhāvāsa (rupāvacara Brahm realms reserved for Anāgāmis.)
This is why Buddhas can also predict when a Bodhisatta with “niyata vivarana” will become a Buddha at a specific time.
