Mbh 3.260.2

Vaisampayana said, “When, O great king, Duryodhana heard that the Pandavas were living as happily in the woods as in a city, he longed, with the artful Karna, Dussasana and others, to do them harm. And while those evil-minded persons were employed in concerting various wicked designs, the virtuous and celebrated ascetic Durvasa, following the bent of his own will, arrived at the city of the Kurus with ten thousand disciples. And seeing the irascible ascetic arrived, Duryodhana and his brothers welcomed him with great humility, self-abasement and gentleness. And himself attending on the Rishi as a menial, the prince gave him a right worshipful reception. And the illustrious Muni stayed there for a few days, while king Duryodhana, watchful of his imprecations, attended on him diligently by day and night. And sometimes the Muni would say, ‘I am hungry, O king, give me some food quickly.’ And sometimes he would go out for a bath and, returning at a late hour, would say, ‘I shall not eat anything today as I have no appetite,’ and so saying would disappear from his sight. And sometimes, coming all on a sudden, he would say, ‘Feed us quickly.’ And at other times, bent on some mischief, he would awake at midnight and having caused his meals to be prepared as before, would carp at them and not partake of them at all. And trying the prince in this way for a while, when the Muni found that the king Duryodhana was neither angered, nor annoyed, he became graciously inclined towards him. And then, O Bharata, the intractable Durvasa said unto him, ‘I have power to grant thee boons. Thou mayst ask of me whatever lies nearest to thy heart. May good fortune be thine. Pleased as I am with thee, thou mayst obtain from me anything that is not opposed to religion and morals.’