觀無量壽佛經義疏 3.258

3.258

「爾時世尊足步虛空，還耆闍崛山。」據佛王宮說經時久，或眾不散待佛還來，或是再集，皆不可測。二、阿難轉說。

"At that time the World-Honoured One walked through the air and returned to Mount Gṛdhrakūṭa." Given that the Buddha's preaching of the sūtra in the royal palace took a long time, whether the assembly did not disperse but waited for the Buddha's return, or whether they assembled again, cannot be known. Second, Ānanda re-expounds it.