Mahabharata Anushasna Parva Chapter 118:2

Mahabharata Anushasna Parva (Dana Dharma Parva) Chapter 118:2 The worm said, 'My present status is that high one which is coveted by all and which is attainable by the possession of the ten well-known attributes. Indeed, I who was formerly a worm have thus attained to the status of a prince. Elephants of great strength, decked with golden chains, bear me on their backs. Unto my cars are yoked Kamvoja steeds of high mettle. Numerous vehicles, unto which are attached camels and mules, bear me. With all my relatives and friends I now eat food rich with meat. Worshipped by all, I sleep, O highly blessed one, on costly beds in delightful rooms into which disagreeable winds cannot blow. Towards the small hours of every night, Sutas and Magadhas and encomiasts utter my praises even as the deities utter the agreeable praises of Indra, their chief. Through the grace of thyself that art firm in truth and endued with immeasurable energy, I who was before a worm have now become a person of the royal order. I bow my head to thee, O thou of great wisdom. Do thou command me as to what I should do now. Ordained by the puissance of thy penances, even this happy status hath now become mine!' Vyasa said, 'I have today been worshipped by thee, O king, with diverse words expressive of reverence. Transformed into a worm, thy memory had become clouded. That memory has again appeared. The sin thou committed in a former life has not yet been destroyed,—that sin, viz., which was earned by thee while thou wert a Sudra covetous of wealth and cruel in behaviour and hostile to the Brahmanas. Thou wert able to obtain a sight of my person. That was an act of merit to thee while thou wert a worm. In consequence of thy having saluted and worshipped me thou shalt rise higher, for, from the Kshatriya order thou shalt rise to the status of a Brahmana, if only thou castest off thy life-breaths on the field of battle for the sake of kine or Brahmanas. O prince, enjoying much felicity and performing many sacrifices with copious presents, thou shalt attain to heaven and transformed into eternal Brahma, thou wilt have perfect beatitude. Those that take birth in the intermediate order (of animals) become (when they rise) Sudras. The Sudra rises to the status of the Vaisya; and the Vaisya to that of the Kshatriya. The Kshatriya who takes pride in the discharge of the duties of his order, succeeds in attaining to the status of a Brahmana. The Brahmana, by following a righteous conduct, attains to heaven that is fraught with great felicity.'