Kassapa Sutta - Kassapa Sutta Translated from the Pali by Thanissaro Bhikkhu.

I have heard that on one occasion the Blessed One was staying in Rajagaha at the Bamboo Grove, the Squirrels' Sanctuary. Now at that time Ven. Maha Kassapa was staying at the Pipphali Cave, afflicted, in pain, and seriously ill. Then, at a later time, he recovered from his illness. When he had recovered from the illness, the thought occurred to him: "What if I were to go into Rajagaha for alms?"

Now at that time 500 devatas were eager for the chance to give alms to Ven. Maha Kassapa. But Ven. Maha Kassapa, turning down those 500 devatas, early in the morning put on his robes and, carrying his bowl and outer robe, went into Rajagaha for alms along the streets of the poor, the streets of the indigent, the streets of the weavers. The Blessed One saw that Ven. Maha Kassapa had gone into Rajagaha for alms along the streets of the poor, the streets of the indigent, the streets of the weavers.

Then, on realizing the significance of that, the Blessed One on that occasion exclaimed:

Maintaining no others,
unknown,
trained, established
in what is essential,
effluents* ended,
anger disgorged:
He's what I call
a brahman.

(http://pratyeka.org/a2i/canon/sutta/khuddaka/udana/ud1-06.html)