妙法蓮華經文句 10.75

10.75

「爾時釋迦」下，是第三唱散。多寶為證經故來，今迹本二門已訖，故須敬遣如故。分身為開塔故集，開塔事了故令分身還本。塔不可重開，故分身去而不現，塔猶聽法故閉而尚在。

From "At that time, Śākyamuni" downward is the third part, proclaiming dismissal. Prabhūtaratna came to bear witness to the sūtra; now that the two gates of traces and origin are completed, he must be reverently sent off as before. The emanation bodies gathered to open the stūpa; since opening the stūpa is finished, the emanation bodies are ordered to return to their origins. The stūpa cannot be reopened, so the emanation bodies depart and become invisible, while the stūpa remains closed because it still listens to the Dharma.