Mbh 13.23.4a

"'"Listen now to me as I mention who the Brahmana is that has been ordained for acts done in honour of the deities and the Pitris. Indeed, I shall tell thee what those merits are in consequence of which one may become a giver or a recipient of gifts in Sraddhas (notwithstanding the faults mentioned above).[218] Those Brahmanas that are observant of the rites and ceremonies laid down in the scriptures, or they that are possessed of merit, or they that are conversant with the Gayatri, or they that are observant of the ordinary duties of Brahmanas, even if they happen to betake themselves to agriculture for a living, are capable, O king, of being invited to Sraddhas. If a Brahmana happens to be wellborn, he deserves to be invited to Sraddhas notwithstanding his profession of arms for fighting the battle of others.[219] That Brahmana, however, O son, who happens to betake himself to trade for a living should be discarded (even if possessed of merit). The Brahmana who pours libations every day on the sacred fire, or who resides in a fixed habitation, who is not a thief and who does the duties of hospitality to guests arrived at his house, deserves, O king, to be invited to Sraddhas. The Brahmana, O chief of Bharata's race, who recites the Savitri morning, noon, and night, or who subsists upon eleemosynary charity, who is observant of the rites and ceremonies laid down in the scriptures for persons of his order, deserves, O king, to be invited to Sraddhas.[220] That Brahmana who having earned wealth in the morning becomes poor in the afternoon, or who poor in the morning becomes wealthy in the evening or who is destitute of malice, or is stained by a minor fault, deserves, O king, to be invited to Sraddhas. That Brahmana who is destitute of pride or sin, who is not given to dry disputation, or who subsists upon alms obtained in his rounds of mendicancy from house to house deserves, O king, to be invited to sacrifices.