Mbh 4.50.1a

“Aswatthaman said, ‘The kine, O Karna, have not yet been won, nor have they yet crossed the boundary (of their owner’s dominions), nor have they yet reached Hastinapura. Why dost thou, therefore, boast of thyself? Having won numerous battles, and acquired enormous wealth, and vanquished hostile hosts, men of true heroism speak not a word of their prowess. Fire burneth mutely and mutely doth the sun shine. Mutely also doth the Earth bear creatures, both mobile and immobile. The Self-existent hath sanctioned such offices for the four orders that having recourse to them each may acquire wealth without being censurable. A Brahmana, having studied the Vedas, should perform sacrifices himself, and officiate at the sacrifices of others. And a Kshatriya, depending upon the bow, should perform sacrifices himself but should never officiate at the sacrifices of others. And of Vaisya, having earned wealth, should cause the rites enjoined in the Vedas to be performed for himself. A Sudra should always wait upon and serve the other three orders. As regards those that live by practising the profession of flowers and vendors of meat, they may earn wealth by expedients fraught with deceit and fraud. Always acting according to the dictates of the scriptures, the exalted sons of Pandu acquired the sovereignty of the whole earth, and they always act respectfully towards their superiors, even if the latter prove hostile to them. What Kshatriya is there that expressed delight at having obtained a kingdom by means of dice, like this wicked and shameless son of Dhritarashtra? Having acquired wealth in this way by deceit and fraud like a vendor of meat, who that is wise boast of it? In what single combat didst thou vanquish Dhananjaya, or Nakula, or Sahadeva, although thou hast robbed them of their wealth? In what battle didst thou defeat Yudhishthira, or Bhima that foremost of strong men? In what battle was Indraprastha conquered by thee?