19-21.
The Discourse on Animals, Humans, Hell and so on
1190-1192.
Etc. "So too, monks, few are those beings who, having passed away from the animal realm, are reborn among human beings;
but there are indeed more beings who, having passed away from the animal realm, are reborn in hell, etc.
are reborn in the animal realm, etc.
are reborn in the sphere of ghosts, etc.
The twenty-first.