法華義疏 7.138

7.138

即遣傍人，謂一乘實教也；密遣二人，謂方便教也。故前隱於實教而起方便教。二身者，師子座之長者，謂真身也；脫珍御服著弊垢衣，謂化身也。既隱實教而說權教，亦隱真身而起化身也。

Sending the attendants refers to the real teaching of the ekayāna; secretly dispatching the two men refers to the provisional teaching. Therefore, he previously concealed the real teaching and gave rise to the provisional teaching. As for the two bodies: the elder on the lion throne refers to the true body; removing the precious ornate garments and putting on ragged and soiled clothes refers to the transformation body. Since he concealed the real teaching and preached the provisional teaching, he likewise concealed the true body and manifested the transformation body.