大方廣佛華嚴經隨疏演義鈔 89.14

89.14

疏十二「哆字」，從「不動則圓滿發光」，會經也。如密室燈定、如止水影圓，契於如如，知無動矣。《智論》云「若聞哆字，即知諸法在如中不動，以哆他此言如故。」

Regarding the commentary's "Twelve: the syllable ta": from "being unmoving, it emits light fully and completely," it reconciles with the sūtra. Like a lamp fixed in a secret room, like a reflection round in still water, it accords with thusness (tathatā) and knows there is no movement. The Dazhidulun says: "Hearing the syllable ta, one immediately knows that all phenomena are unmoving within thusness, because here tathā means thusness."