Adhyāya 166: Kṛtaghna-doṣa (कृतघ्नदोषः) — the fault of ingratitude and the limits of expiation
अपसरभत्र्यहं पिबेदुष्णं ःयहमुष्णं पय: पिबेत् । त्रयहमुष्णं पय: पीत्वा वायुभक्षो भवेत् तयहम्
apsarabhātry ahaṁ pibed uṣṇaṁ tryaham uṣṇaṁ payaḥ pibet | tryaham uṣṇaṁ payaḥ pītvā vāyubhakṣo bhavet tryaham ||
Bhīṣma said: “If a Soma-drinking brāhmaṇa even smells the odor of liquor, he should undertake a purificatory regimen: for three days he should drink only hot water; for the next three days he should drink only hot milk; and after drinking hot milk for three days, he should live for three days on air alone (i.e., fast completely). By this discipline he becomes purified.”
भीष्म उवाच
Even indirect contact with a serious impurity (here, the smell of liquor) is treated as ethically and ritually significant for a Soma-qualified brāhmaṇa; purification is achieved through a graded, disciplined austerity—hot water, then hot milk, then complete fasting—emphasizing self-restraint and restoration of ritual fitness.
In Śānti Parva’s dharma instruction, Bhīṣma lays down a specific expiatory procedure (prāyaścitta) for a brāhmaṇa who has encountered the odor of alcohol, prescribing a nine-day regimen culminating in a three-day fast to regain purity.