Mahabharata 13.74.26

13.74.26

guruśuśrūṣayā śūrāḥ pitṛśuśrūṣayāpare |
mātṛśuśrūṣayā śūrā bhaikṣyaśūrāstathāpare || 26 ||

The Sudra, who duly observes the duties of his order (which consist of services rendered to the three other orders) wins heaven as the reward of such services. Diverse kinds of heroes have been spoken of (in the scriptures). Listen to me as I expound to thee what the rewards are that they attain to. The rewards are fixed of a hero belonging to a heroic race. There are heroes of sacrifice, heroes of self-restraint, heroes of truth, and others equally entitled to the name of hero. There are heroes of battle, and heroes of gift of liberality among men. There are many persons, who may be called the heroes of the Sankhya faith as, indeed, there are many others that are called heroes of Yoga. There are others that are regarded as heroes in the matter of forest-life, of householding or domesticity, and of renunciation (or Sannyasa). Similarly, there are others that are called heroes of the intellect, and also heroes of forgiveness. There are other men, who live in tranquillity and who are regarded as heroes of righteousness. There are diverse other kinds of heroes that practise diverse other kinds of vows and observances. There are heroes devoted to the study of the Vedas and heroes devoted to the teaching of the same. There are, again, men that come to be regarded as heroes for the devotion with which they wait upon and serve their preceptors, as indeed, heroes in respect of the reverence they show to their sires.