Mbh 13.73.1f

One should also ascertain the distinctive qualifications of both Brahmanas (who are to receive them) and of kine themselves (which are to be given away). Kine should not be given unto one in whose abode they are likely to suffer from fire or the sun. One, who is rich in Vedic lore, who is of pure lineage, who is endued with a tranquil soul, who is devoted to the performance of sacrifices, who fears the commission of sin, who is possessed of varied knowledge, who is compassionate towards kine, who is mild in behaviour, who accords protection unto all that seek it of him, and who has no means of sustenance assigned unto him, is regarded as a proper person for receiving a gift of kine. Unto a Brahmana who has no means of sustenance, unto him while he is exceedingly afflicted for want of food (in a time, of famine, for example) for purposes of agriculture, for a child born in consequence of Homa, for the purposes of his preceptor, for the sustenance of a child born (in the ordinary course), should a cow be given. Verily, the gift should be made at a proper time and in a proper place[361]. Those kine, O Sakra, whose dispositions are well-known, which have been acquired as honoraria for knowledge, or which have been purchased in exchange for other animals (such as goats, sheep, etc.), or which have been won by prowess of arms, or obtained as marriage-dower; or which have been acquired by being rescued from situations of danger, or which incapable of being maintained by their poor owner have been made over for careful keep to another's house are, for such reasons, regarded as proper objects of gift. Those kine which are strong of body, which have good dispositions, and which emit an agreeable fragrance, are applauded in the matter of gifts. As Ganga is the foremost of all streams, even so is a Kapila cow the foremost of all animals of the bovine breed.