仁王護國般若波羅蜜多經 1.40

1.40

「善男子！諸眾生類一切煩惱——業異熟果二十二根——不出三界，諸佛示導；應、化、法身亦不離此。若有說言：『於三界外，別更有一眾生界。』者，即是外道大有經說。

"Good son! All defilements of sentient beings—the ripened karmic fruits and the twenty-two faculties—do not go beyond the three realms, which the Buddhas indicate and guide; the response body, transformation body, and Dharma body are also not separated from this. If anyone says: 'Apart from the three realms, there is separately another realm of sentient beings,' that is the preaching of the Great Being Sūtra of the non-Buddhists."