仁王般若經疏 3.47

3.47

第四諸大眾天人散華。有三：初散天華釋迦上；二華於空中成紫雲蓋，覆三千大千世界；三蓋中天人散恒沙華。此等若就事是敬供養，若約行即修行供養。

Fourth, the great assembly, devas, and humans scattering flowers. There are three [parts]: First, they scattered heavenly flowers over Śākyamuni; second, the flowers formed a canopy of purple clouds in the sky, covering the trisāhasra-mahāsāhasra-lokadhātu; third, the devas and humans within the canopy scattered flowers numerous as the sands of the Ganges. These, in terms of external practice, are reverent offerings, and in terms of practice, they are the offering of practice.