新華嚴經論 3.52

3.52

第一先放齒間十種光明，莊嚴法界一切道場，為初登正覺，十方告眾，使令咸集，如經廣明。此為莊嚴告眾雲集光故。

First, he initially emits ten kinds of light from between his teeth, adorning all bodhimaṇḍas of the dharmadhātu, so that upon first ascending to right awakening, he announces to the assemblies in the ten directions, causing them all to gather, as extensively clarified in the sūtra. This is the light that adorns and announces to the assemblies to gather like clouds.