On Yuan Chwang's Travels in India, 629–645 A.D. v1.c9.s2.10

v1.c9.s2.10

Then there was the place at which the P‘usa spread out his deer-skin mantle and his hair on the muddy road to preserve Dīpankara’s feet from being defiled. On the road by which this Buddha was proceeding to the capital on this memorable occasion were several dirty muddy places which the people were trying to make clean. The brahmin student, at his own request, was allowed to put right a hollow in the road made by running water. Unable to fill up this muddy gap on the approach of the Buddha, he spread out in it his deerskin mantle, and then lay down prostrate with his long hair spread out for the Buddha to step on. Though the world had passed away and been renewed since the time of Dīpankara and Megha (or Sumati) yet the depression in the road remained visible, being renewed with the renewal of the world. Close to the spot was a small tope of great antiquity, the successor of the original wooden stake, and not far from it was a very magnificent tope by king Asoka.