Mbh 3.258.3a

“And, O king, it came to pass that having heard of the virtuous Mudgala observant of vows, the Muni Durvasa, having space alone for his covering,[87] his accoutrements worn like that of maniac, and his head bare of hair, came there, uttering, O Pandava various insulting words. And having arrived there that best of Munis said unto the Brahmana. ‘Know thou, O foremost of Brahmanas, that I have come hither seeking for food. Thereupon Mudgala said unto the sage, ‘Thou art welcome!’ And then offering to that maniac of an ascetic affected by hunger, water to wash his feet and mouth, that one observant of the vow of feeding guests, respectfully placed before him excellent fare. Affected by hunger, the frantic Rishi completely exhausted the food that had been offered unto him. Thereupon, Mudgala furnished him again with food. Then having eaten up all that food, he besmeared his body with the unclean orts and went away as he had come. In this manner, during the next season, he came again and ate up all the food supplied by that wise one leading the Unchha mode of life. Thereupon, without partaking any food himself, the sage Mudgala again became engaged in collecting corn, following the Unchha mode. Hunger could not disturb his equanimity. Nor could anger, nor guile, nor a sense of degradation, nor agitation, enter into the heart of that best of Brahmanas leading the Unchha mode of life along with his son and his wife. In this way, Durvasa having made up his mind, during successive seasons presented himself for six several times before that best of sages living according to the Unchha mode; yet that Muni could not perceive any agitation in Mudgala’s heart; and he found the pure heart of the pure-souled ascetic always pure. Thereupon, well-pleased, the sage addressed Mudgala, saying, There is not another guileless and charitable being like thee on earth. The pangs of hunger drive away to a distance the sense of righteousness and deprive people of all patience.