說無垢稱經疏 2.122

2.122

贊曰：下現他方十方如來，及與彼佛所說正法皆現蓋中。蓋中有聲猶如谷響，應本所說而此可聞。本聲影故，佛影可見，故言蓋內無不見聞。此略不言諸眾眷屬，理准定有，非佛獨居、法空說故。現他方者，表彼成佛能現一切佛淨土故。

Commentary: Below, the Tathāgatas of the ten directions in other realms, together with the true Dharma expounded by those Buddhas, all appear within the canopy. In the canopy there are sounds like echoes in a valley, responding to what was originally expounded so that they can be heard here. Because they are the reflected shadows of the original sounds, the shadows of the Buddhas can be seen; hence it says that within the canopy there was nothing that was not seen or heard. Here it briefly omits mentioning their assemblies and retinues, but by reasoning they certainly exist, because a Buddha does not abide alone and the Dharma is not expounded to emptiness. The manifestation of other realms signifies that when he attained Buddhahood he was able to manifest all pure lands of the Buddhas.