大方廣佛華嚴經隨疏演義鈔 34.43

34.43

疏「於不共者唯一佛變」者，第二釋不共。設見十方百千化佛，亦是一佛化現諸身耳。

Regarding the Commentary's statement, "As for the unshared, only one Buddha transforms": second, it explains the unshared. Even if one sees hundreds of thousands of transformation Buddhas throughout the ten directions, they are also merely the manifold bodies transformed and manifested by a single Buddha.