佛說仁王般若波羅蜜經 1.26

1.26

「善男子！一切眾生煩惱不出三界藏，一切眾生果報二十二根不出三界，諸佛應化法身亦不出三界。三界外無眾生，佛何所化？是故我言，三界外別有一眾生界藏者，外道大有經中說，非七佛之所說。

"Good man! The afflictions of all sentient beings do not exceed the store of the three realms; the karmic results and twenty-two faculties of all sentient beings do not exceed the three realms; the response, transformation, and dharma bodies of all buddhas likewise do not exceed the three realms. Outside the three realms there are no sentient beings; what would a buddha convert? For this reason, I say: that there is another separate store of a realm of sentient beings outside the three realms is spoken of in the great existence scriptures of non-Buddhists; it is not what has been spoken by the seven buddhas.