Shloka 263
Go-mahātmyam: Pavitrāṇāṃ Pavitraṃ
Cows and Ghee as Supreme Purifiers
आसामैश्वर्यमिच्छन्ति सर्वेडमृतमयं शुभम् | 'जैसे वायु
āsām aiśvaryam icchanti sarve ’mṛtamayaṃ śubham | yathā vāyur agniḥ suvarṇaṃ samudro devatābhiḥ pītam amṛtaṃ ca na ucchiṣṭaṃ bhavati, tathā vatsānāṃ pāne ’pi vatsasnehavatī gauḥ na dūṣyate na ucchiṣṭā bhavati | (tātparyam: pāne vatsamukhāt patitaḥ phenakaḥ aśuddhaḥ na manyate) etā gāvaḥ svadugdhaghṛtābhyāṃ idaṃ sarvaṃ jagat pālayiṣyanti | sarve icchanti etāsāṃ gāṃ madhye maṅgalakārī amṛtamaya-dugdha-sampad avicchinnā tiṣṭhet |
毗湿摩解释说：众人都愿这些母牛常得吉祥、如甘露般的丰饶。正如风、火、黄金、大海，乃至诸天所饮的甘露，都不被视为“污秽”或“残余”；同样地，那以慈爱哺育犊子的母牛，也不会因犊子吮饮而变得不净。因此，犊子饮乳时自口中落下的乳沫，并不算不洁。此等母牛以其乳与酥油（ghee）养育整个世界；故而人们祈愿她们那如甘露般的福乳之财，恒常充盈不竭。
भीष्म उवाच
Educational Q&A
Bhishma teaches that a cow’s nurturing act is intrinsically pure: even if a calf’s mouth-contact produces foam or remnants, it is not treated as ucchiṣṭa (defiling leftover). This supports a dharmic ethic that honors the cow as a sustaining, auspicious source of nourishment for society.
In Bhishma’s instruction on dharma, he addresses concerns about impurity connected with calves drinking. He uses analogies (wind, fire, gold, ocean, divine nectar) to argue that certain sustaining or inherently pure substances are not defiled, and concludes by praising cows whose milk and ghee maintain the world and whose abundance everyone wishes to preserve.