說無垢稱經疏 2.255

2.255

第七共不共者，《成唯識》云「其法性土，一切如來同所證故，體無差別。自受用土，雖一切佛各變不同，而皆無邊，不相障礙。餘二佛土，隨諸如來所化有情有共不共。所化共者，同處同時，隨應諸佛各變為土，形狀相似，不相障礙、展轉相雜，為增上緣。令所化生自識變現，謂於一土有一佛身，為現神通說法饒益。如是土眾生，宜聞釋迦、彌勒、彌陀，此等諸佛即共變之。於不共者，唯一佛變。諸有情類無始時來種性法爾，更相繫屬，或多屬一、或一屬多，如底沙佛令釋迦菩薩超九劫等，故所化生有共不共。不爾多佛久住世間，各事劬勞實為無益，一佛能益一切生故。」由此變化他受用土，有共不共。

Seventh, regarding the shared and unshared: The Cheng weishi lun states: "Because the land of the nature of phenomena is realized in common by all Tathāgatas, its essence is without difference. Although the lands of self-enjoyment are transformed differently by each buddha, they are all boundless and do not obstruct one another. The other two buddha lands are shared or unshared in accordance with the sentient beings to be transformed by the various Tathāgatas. Where those to be transformed are shared, at the same place and at the same time, the respective buddhas each transform it into a land as appropriate; their forms resemble one another, they do not obstruct one another, and they interpenetrate each other, serving as an overriding condition (adhipatipratyaya). This causes the beings to be transformed to have it manifest from their own consciousness, so that in a single land there is a single buddha body, manifesting supernormal powers and preaching the Dharma for their benefit. For sentient beings in such a land who are suited to hear Śākya, Maitreya, or Amitāyus, these respective buddhas transform it together. In the case of what is unshared, only one buddha transforms it. From beginningless time, sentient beings by nature and disposition are interconnected with one another, either many being connected to one, or one to many—just as Tiṣya Buddha caused Śākya Bodhisattva to surpass nine kalpas, and so forth. Therefore, the sentient beings to be transformed are either shared or unshared. Were it not so, then multiple buddhas remaining in the world for a long time, each toiling on their own tasks, would truly be to no benefit, since a single buddha can benefit all beings." For this reason, the transformation land and the land of enjoyment for others are either shared or unshared.