Mahabharata 13.78.7
तस्माद्गावो महाभागाः पवित्रं परमुच्यतेतथैव सर्वभूतानां गावस्तिष्ठन्ति मूर्धनि
tasmādgāvo mahābhāgāḥ pavitraṃ paramucyatetathaiva sarvabhūtānāṃ gāvastiṣṭhanti mūrdhani
Our plain-language meaning of this verse is waiting for scholar review.
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