Mbh 13.59.2b

Those persons who do not utter blessings upon the deities and men (in expectation of gifts), who are deserving of reverence and always contented, and who subsist upon such alms as they get without solicitation of any kind, are regarded as veritable snakes of virulent poison. Do thou, O Bharata, always protect thyself from them by making gifts unto them. They are competent to make the foremost of Ritwikas. Thou art to find them out by means of thy spies and agents.[319] Thou shouldst honour those men by gifts of good houses equipped with every necessary article, with slaves and serving men, with good robes and vestments, O son of Kuru, and with all articles competent to contribute to one's pleasure and happiness. Righteous men of righteous deeds should make such gifts, impelled by the motive that it is their duty to act in that way and not from desire of reaping any rewards therefrom. Verily good men should act in this way so that the virtuous men described above might not, O Yudhishthira, feel any disinclination to accept those gifts sanctified by devotion and faith. There are persons bathed in learning and bathed in vows. Without depending upon anybody they obtain their means of subsistence. These Brahmanas of rigid vows are devoted to Vedic study and penances without proclaiming their practices to any one. Whatever gifts thou mayst make unto those persons of pure behaviour, of thorough mastery over their senses, and always contented with their own wedded spouses in the matter of desire, are sure to win for thee a merit that will accompany thee into all the worlds into which thou mayst go. One reaps the same merit by making gifts unto regenerate persons of restrained souls which one wins by properly pouring libations unto the sacred fire morning and evening. Even this is the sacrifice spread out for thee,--a sacrifice that is sanctified by devotion and faith and that is endued with Dakshina. It is distinguished above all other sacrifices.