One who knows the meaning of the Veda, and he who expounds it, a student, one who has given a thousand (cows), and a centenarian must be considered as Brahmanas who sanctify a company.
On the day before the Sraddha-rite is performed, or on the day when it takes place, let him invite with due respect at least three Brahmanas, such as have been mentioned above.
निमन्त्रितो द्विजः पित्र्ये नियतात्मा भवेत् सदा । न च छन्दांस्यधीयीत यस्य श्राद्धं च तद् भवेत् ॥ १८८ ॥
A Brahmana who has been invited to a (rite) in honour of the manes shall always control himself and not recite the Veda, and he who performs the Sraddha (must act in the same manner).
But a Brahmana who, being duly invited to a rite in honour of the gods or of the manes, in any way breaks (the appointment), becomes guilty (of a crime), and (in his next birth) a hog.