History of Dharmashastra (Ancient and Mediaeval Religious and Civil Law in India) v2.c20.52.4

v2.c20.52.4

22-24) that a brāhmaṇa may maintain himself in any way if unable to maintain himself (by the three means specially prescribed for him), but he should not resort to the actions peculiar to a śūdra, that according to some ācāryas he may do even those actions when life itself is in danger, but that when he stoops to the actions peculiar to śūdras for maintenance he should not mix himself up with members of that varṇa (by sitting on the same seat with them etc.) or eat articles forbidden to brāhmaṇas (such as leek and garlic) and should not be a mere menial servant. Vide Manu (IV. 4 and 6) and Nārada (ṛṇādāna 57).