仁王經疏 3.107

3.107

釋曰：第三、散妙覺華。文有四別：一諸王散華、二「於虛空」下華變為城、三「城中」下化佛說法、四「時城」下化眾散華。此即前三。金剛喻智、城譬涅槃，智斷雙明，名金剛城。

Explanation: The third [part] is scattering marvelous awakening flowers. The text has four distinctions: first, the kings scatter flowers; second, from "in empty space" downward, the flowers transform into a city; third, from "in the city" downward, the transformation buddhas teach the Dharma; fourth, from "at that time, in the city" downward, the transformed assembly scatters flowers. This refers to the previous three. The diamond exemplifies wisdom, and the city exemplifies nirvāṇa; with both wisdom and severance illuminated together, it is called the Diamond City.