Mbh 5.63.1a

“Duryodhana said, ‘The sons of Pritha are all as other men, and are, in fact, of earthly birth as other men. Why then dost thou think that they are sure to win victory? Both ourselves and they are equal in energy, in prowess, in age, in intelligence, in knowledge of the scriptures, in weapons, in the art of war, in lightness of hand, and in skill. All of us are of the of same species, all being men by birth. How then, O grandsire, dost thou know that victory will be theirs? I do not seek the accomplishment of my aims by relying upon thee, or Drona, or Kripa or Valhika, or upon the other kings. Myself, and Karna, the son of Vikartana, and my brother Dussasana, will slay in battle the five sons of Pandu by sharpened arrows. Then shall we, O king, gratify Brahmanas by performing great sacrifices of diverse kinds, with abundant Dakshinas, and by gifts of kine and horses and wealth. When my troops will drag by the aid of their mighty arms the Pandavas in battle, like hunters dragging a herd of deer by a net, or whirlpools drawing a crewless boat, then the sons of Pandu, beholding us their foe, supported by crowds and cars and elephants, will give up their pride, and not they alone but Kesava also.’ Hearing this, Vidura said, ‘Venerable persons of infallible knowledge say that in this world self-restraint is highly beneficial. In the case of Brahmana especially, it is his duty. He whose self-restraint followeth charity, asceticism, knowledge, and study of the Vedas, always winneth success, forgiveness, and the fruit of his gifts. Self-restraint enhanceth energy, and is an excellent and holy attribute. Freed from sin and his energy increased by Self-restraint, one acquireth even Brahma through it. People are always afraid of those that are without self-restraint, as if the latter were very Rakshasas. And it is for keeping these under check that the self-Existent created the Kshatriyas.