Mbh 13.23.6a

"'Bhishma said,--"Do thou, Yudhishthira, feed those Brahmanas whose spouses reverently wait for the remnants of the dishes of their husbands like tillers of the soil waiting in reverence for timely showers of rain. One earns great merit by making gifts unto those Brahmanas that are always observant of pure conduct, O king, that are emaciated through abstention from all luxuries and even full meals, that are devoted to the observances of such vows as lead to the emaciation of the body, and that approach givers with the desire of obtaining gifts. By making gifts unto such Brahmanas as regard conduct in this light of food, as regard conduct in the light of spouses and children, as regard conduct in the light of strength, as regard conduct in the light of their refuge for crossing this world and attaining to felicity in the next, and as solicit wealth only when wealth is absolutely needed, one earns great merit. By making gifts unto those persons, O Yudhishthira, that having lost everything through thieves or oppressors, approach the giver, one acquires great merit.[227] By making gifts unto such Brahmanas as solicit food from the hands of even a poor person of their order who has just got something from others, one earns great merit. By making gifts unto such Brahmanas as have lost their all in times of universal distress and as have been deprived of their spouses on such occasions, and as come to givers with solicitations for alms, one acquires great merit. By making gifts unto such Brahmanas as are observant of vows, and as place themselves voluntarily under painful rules and regulations, as are respectful in their conduct to the declaration laid down in the Vedas, and as come to solicit wealth for spending it upon the rites necessary to complete their vows and other observances, one earns great merit.