Manava Dharmashastra 5.21

5.21

bhojyaśūdragṛhabhojino brāhmaṇasyedamucyate | yasya śūdrasya gṛhe yāni brāhmaṇānāmabhojyānyannāni sambhavanti, na dūrataḥ parihriyante, tādṛśasya gṛhe yo brāhmaṇo'nnaṃ bhuṅkte tasya pratiṣiddhānnabhojanāśaṅkāyāṃ prājāpatyakṛcchracaraṇamupadiśyate | aviśeṣanodanāryā prājāpatyaṃ kṛcchraṃ pratīyata iti vakṣyāmaḥ | ajñātabhuktaśuddhyarthamajñātadoṣaśaṅkāyāmāha | doṣo yadi bhuṅkte tasya śuddhayartham | "nanu ca īdṛśasya śuddhiṃ vakṣyati ( 5 | 127 ) "adṛṣṭamadbhirnirṇiktamiti” | tasya viṣayaṃ tatraiva darśayiṣyāmaḥ | jñātasya tu doṣasya viśeṣataḥ vaiśeṣikaṃ prāyaścittaṃ kartavyam, yasya yadvihitaṃ pratipadam |

It is possible that at the house of a Śūdra, there may he some articles of food that are not fit to be eaten by the Brāhmaṇa, which can not always be avoided; if the Brāhmaṇa eats at the house of such a Śūdra, there is always a fear of his having partaken of some forbidden food; hence for him it is laid down that he should perforin the ‘Prājāpatya Kṛcchra’. In all bases where the precise form of the ‘kṛcchra’ is not laid down, it should be understood to be the‘Prājāpatya’ kṛcchra as we shall explain later on.

‘In order to atone for unintentional eating’:—i.e., in the event of there being suspicion of his having unwillingly partaken of forbidden food; that is, for the expiating of the sin incurred, in the event of his having eaten forbidden food.

“But the expiation for this is going to be prescribed later on, under 5.I27.”

What that means and refers to we shall explain in connection with that verse.

For the art committed intentionally, special rites should be performed; i.e. that expiatory rite which has been prescribed in many words in connection with a particular case—(21).

Medhātithi’s commentary (manubhāṣya):
This refers to the Brāhmaṇa who is in the habit of eating at the house of those Śūdra whose food he is permitted to eat.