Mbh 13.121.4b

The ignorant who eats the food offered to him loses his right to the children he begets, for the latter become his whose food has enabled the progenitor to beget them. Even this is the subtle fault that attaches to persons eating other people's food when they have not the puissance to win that food. The merit which the giver acquires by making the gift, is equal to what the taker acquires by accepting the food. Both the giver and the acceptor depend equally upon each other. Even this is what the Rishis have said. There where Brahmanas exist, possessed of Vedic lore and conduct, people are enabled to earn the sacred fruits of gifts and to enjoy them both here and hereafter. Those men who are of pure lineage, who are exceedingly devoted to penances, and who make gifts, and study the Vedas, are regarded as worthy of the most reverent worship. It is those good men that have chalked out the path by treading on which one does not become stupefied. It is those men that are the leaders of others to heaven. They are the men who bear on their shoulders the burden of sacrifices and live for eternity.'"'"