Mahabharata 5.42.26

5.42.26

anāḍhyā mānuṣe vitte āḍhyā vedeṣu ye dvijāḥ |
te durdharṣā duṣprakampyā vidyāttānbrahmaṇastanum || 26 ||

The food offered by that person who is not pained at the sight of another disclosing his superiority, and who never eateth without offering the prescribed share to Brahmanas and guests, is approved by the righteous. As a dog oftentimes devoureth its own evacuations to its injury, so those Yogins devour their own vomit who procure their livelihood by disclosing their pre-eminence. The wise know him for a Brahmana, who, living in the midst of kindred, wishes his religious practices to remain always unknown to them. What other Brahmana deserveth to know the Supreme Soul, that is unconditioned, without attributes, unchangeable, one and alone, and without duality of any kind? In consequence of such practices, a Kshatriya can know the Supreme Soul and behold it in his own soul. He that regardeth the Soul to be the acting and feeling Self,--what sins are not committed by that thief who robbeth the soul of its attributes? A Brahmana should be without exertion, should never accept gifts, should win the respect of the righteous, should be quiet, and though conversant with the Vedas should seem to be otherwise, for then only may he attain to knowledge and know Brahman. They that are poor in earthly but rich in heavenly wealth and sacrifices, become unconquerable and fearless, and they should be regarded as embodiments of Brahman.