Mbh 13.90.3c

Thou shouldst invite only such among them as are devoted to the duties laid down for their order, and as are born in good families, and as are possessed of great learning. He who performs Sraddhas for feeding only his friends and whose Havi does not gratify the deities and the Pitris, fails to ascend to Heaven. He who collects his friends and relatives only on the occasion of the Sraddha he performs (without keeping an eye on properly honouring deserving persons by inviting and feeding them), fails to proceed (after death) by the path of the deities (which is a lighted one and free from all afflictions and impediments). The man who makes the Sraddha he performs an occasion for only gathering his friends, never succeeds in ascending to heaven. Verily, the man who converts the Sraddha into an occasion for treating his friends, becomes dissociated from heaven even like a bird dissociated from the perch when the chain tying it breaks.[408] Therefore, he that performs a Sraddha should not honour (on such occasions) his friends. He may make gifts of wealth unto them on other occasions by collecting them together. The Havi and the Kavi offered at Sraddhas should be served unto them that are neither friends nor foes but are only indifferent or neutral. As seed sown on a sterile soil does not sprout forth, or as one that has not sown does not get a share of the produce, even so that Sraddha the offerings in which are eaten by an unworthy person, yields no fruit either here or hereafter.[409] That Brahmana who is destitute of Vedic study is like a fire made by burning grass or straw; and becomes soon extinguished even like such a fire. The offerings made at Sraddhas should not be given to him even as libations should not be poured on the ashes of the sacrificial fire. When the offerings made at Sraddhas are exchanged by the performers with one another (instead of being given away unto worthy persons), they come to be regarded as Pisacha presents.