Mbh 14.91.2c

That Brahmana of uncontrolled conduct, who acquires wealth by sinful acts, ever overwhelmed by passion and stupefaction, attains at last to the goal of the sinful. Someone, overwhelmed by cupidity and stupefaction, becomes bent on strong wealth. He is seen to persecute all creatures, urged by a sinful and impure understanding. He who, having acquired wealth by such means, makes gifts or performs sacrifices therewith, never enjoys the fruits of those gifts or sacrifices in the other world in consequence of the wealth having been earned by unrighteous means. Men endued with wealth of penances, by giving away, to the best of their power, grains of corn picked up from the fields or roots or fruits or pot-herbs or water or leaves, acquire great merit and proceed to Heaven. Even such gifts, as also compassion to all creatures, and Brahmacharyya, truthfulness of speech and kindness, and fortitude, and forgiveness, constitute the eternal foundations of Righteousness which itself is eternal. We hear of Viswamitra and other kings of ancient times. Indeed, Viswamitra, and Asita, and king Janaka, and Kakshasena and Arshtisena, and king Sindhudwipa,--these and many other kings, endued with wealth of penances, having made gifts of articles acquired lawfully, have attained to high success. Those amongst Brahmanas and Kshatriyas and Vaisyas and Sudras who betake themselves to penances, O Bharata, and who purify themselves by gifts and other acts of righteousness, proceed to Heaven.'"