Mbh 5.163.5

“‘Having heard then, O best of Bharata’s race, those words of Duryodhana, Yudhishthira, that bull of the Bharata race, with eyes exceedingly red in anger and himself sighing like a snake of virulent poison, licking the corners of his mouth with his tongue, as if swelling with wrath, and casting his eyes on Janardana and his own brothers, said unto Uluka these words that were fraught with both mildness and vigour. And tossing his massive arms he said unto the gambler’s son, “Go, O Uluka, and say unto Duryodhana, that ungrateful, wicked-minded embodiment of hostilities, that infamous wretch of his race, these words, viz.,--‘O sinful wretch, thou always behavest with crookedness towards the Pandavas! O sinful fool, he that displayeth his prowess relying on his own might and summoneth his foes (to battle) and fulfilleth his own words, even he is a man of the Kshatriya order! Be thou a Kshatriya, O sinful wretch, and summon us to battle! O infamous one of thy race, do not come to battle, placing at thy head others for whom we profess respect! O Kaurava, relying on thy own might and on that of thy servants, summon the sons of Pritha to battle! Be Kshatriya in every way! He, who summoneth his foes, relying on the might of others, and incapable of receiving them himself is, indeed, a eunuch! Thou, however, thinkest highly of thyself, relying on the might of others! Being weak and unable thyself, why then dost thou roar so (in words) at us?’”