大唐西域記 4.59

4.59

寶階側不遠有窣堵波，是過去四佛坐及經行遺迹之所。其側窣堵波，如來在昔於此澡浴。其側精舍，是如來入定之處。

Beside the precious ladder (temple), and not far from it, is a stūpa where there are traces left of the four past Buddhas, who sat and walked here. By the side of it is another stūpa. This is where Tathāgata, when in the world, bathed himself. By the side of this is a vihāra on the spot where Tathāgata entered Samādhi. By the side of the vihāra there is a long foundation wall 50 paces in length and 7 feet high; this is the place where Tathāgata took exercise. On the spots where his feet trod are figures of the lotus flower. On the right and left of the wall are (two) little stūpas, erected by Śakra and Brahma-rāja. In front of the stūpas of Śakra and Brahma is the place where Utpalavarṇā (Lien-hwa-sih) the Bhikshuṇī, wishing to be the first to see Buddha, was changed into a Chakravartin-rāja when Tathāgata was returning from the palace of Īśvara Deva to Jambudvīpa. At this time Subhūti (Su-pu-ti), quietly seated in his stone cell, thought thus with himself: "Now Buddha is returning down to dwell with men—angels lead and attend him. And now why should I go to the place? Have I not heard him declare that all existing things are void of reality? Since this is the nature of all things, I have already seen with my eyes of wisdom the spiritual (fa) body of Buddha.