The rigvidhanam of Saunaka rishi mentions about different categories of bhojanam that would make a brahmin to incur sin and also the prayaschitha or penance to be performed in such cases.
They are –
1.Kundannam – food given by fools
2. Soothakannam – food from a house where soothaka for 10 days is being observed after a baby is born
3. Sudrannam – food offered by sudra
4. Rajasvalannam – food prepared or offered by women during their menstrual cycle
5. Pathithannam – food from people who have fallen from their spiritual status.
6.Kushtaynnam – food offered by lepers
7. Kshatriyannam – food offered by kshatriyas.
8. Vaisyannam – food offered by vaisyas.
9. Varnatheethannam – food offered by person belonging to a different varna
10.Vidhurannam- food offered by widower
11. Paryayannam – food offered by wanderers
12.Jarinyannam – food offered by unchaste women
13.Sraadhhannam – food offered in various sraadhas.
14.Golakannam – food from son born to a widow
15.Divadvirbhojanam – to eat twice during day
16. Bharyayuktabhojanam – to have food along with wife
17.Panchayajnaviheenasya gruhe – food in the house of a person not performing the panchayajna.
18. Haste dathannam – food given in hand (buffet ?)
19. Yathyannam – food from sanyasis
20.Bahavascha ekapatre bhojanam – many people eating from one plate
21. Svadeenam darsanm kruthva bhojanam – to have food after seeing dog etc.
22. Rajasvaladhvanim sruthva bhojanam – to have food after hearing the voice of a woman having her menstrual cycle.
23. Anthyjanam dhvanim sruthva paschad bhojanam – to have food after hearing the voice of lowly people.
24.Uchhishtabhojanam – to eat the left over of another person
25. Vrudhisraadhabhojanm – food offered in naandi sraaddha
26. Seemanthabhojanm – food offered during seemantha ceremony.
27. Abhisasthe bhojanam – food offered by a sinner.
28. Suthyahani bhojanam – food offered on the day of delivery of a child.
29.Punarbhuvo bhojanm – food offered by a woman who has remarried.
30. Anthyjam sprushtva – food taken after touching lowly people.
31.Bhuktikaale rajah.striyah drushtva – if a woman having her menstrual cycle is seen at the time of taking food.
32.Ashtamyam va chaturdashyam diva bhojanam – to have food during the day on ashtami andchaturdashi
33. Parvadvaye bhanuvare rathrou bhojanm – to have food at night during amavasya, purnima or sunday
34. Ekadasyam ahoratram bhojanam – to have food either on day or night during ekadashi.
35. Vatsareshu manvadishu yugeshu rathrou bhojanam – to have food at night during vishu, yugadi etc.
36.Sthenabhunkthe sraadhakartha – the performer of sraadha having food secretly.
37. Oupasanam vina bhojanam – to have food without performing oupasanam.
38. Suryagrhe, chandragrahe cha – to have food during solar and lunar eclipses
39.Athivikrayinogehe – to have food from one who trades in wool
40. Vaisvadevam vina – food taken without performing vaisvadevam
41. Sraadhakartha punarbhunkte – performer of sraadha if takes food twice times.
42. Kruthaghnannam – food from thankless people
43.Svamidroheegruhe – from the house of one who has deceived his employer or lord
44.Mithradrohee gruhe – from one who has done wrong to his friend
45.Deergharogee gruhe – from one who chronically sick.
46.Pisunasya gruhe – food from a miser
47.Asuyakasya gruhe – food from the jealous
48. Ganannam – food offered as charity to public
49.Akaryadigruhe – from one who performs wrong deeds
50. Akulasya gruhe – from lowly people
51. Dveshyabhaktam – food from enemy
52. Kunjaraghna gruhe – food from one who has killed elephant
53.Hayaghnasya gruhe – from one who has killed horse
54. Goghnasya gruhe – from one who has killed cow
55.Brahmaghnasya gruhe – from one who has caused harm to brahmins
56.Svarnastheyasya gruhe – from one who has stolen gold
57. Talpagasya gruhe – from one who has slept with his guru’s wife
58. Tatsamyogigruhe – from one who associates with the above kind of sinners
59.Asvavikrayinogruhe – from one who sells horses
60 Rasavikrayinogruhe – from one who sells chemicals
61.Ushtravikrayinogruhe – from one who sells camels
