俱舍論疏 8.18

8.18

論「復如何知至中有起故」，第三證處無方所也。得四種定，同一處生，故知四無色生無別處也。又得四定，欲界九處、色十六處差別不同；若生無色，皆於欲、色命終處生，故知離二界中更無別處。從彼四天處沒生下界時，即於前生死處中有現前傳識，故知不從別處來也。

The Śāstra says: "How is it further known ... because intermediate existence arises." The third proves that the places have no spatial location. Attaining the four types of concentration, they are reborn in the same place; therefore, one knows that the four formless rebirths have no distinct places. Moreover, attaining the four concentrations, the nine places of the desire realm and the sixteen places of the form realm differ; if one is born into the formless realm, all are born at the place of dying in the desire or form realm. Therefore, one knows that apart from the two realms there are no other places. When dying from those four heavenly places and being born into a lower realm, intermediate existence appears right at the previous place of death and rebirth, with consciousness transmitting; therefore, one knows that they do not come from another place.