Bhagavatapurana 9.2.5

9.2.5

ekāṃ jagrāha balavān sā cukrośa bhayāturā /
tasyāstu kranditaṃ śrutvā pṛṣadhro 'nusasāra ha //

5 & 6. The powerful (wild) beast seized one of them and she in anxious fear screamed aloud; hearing the screaming cow, Prishadhra rushed forward in haste with a sword in hand, in the dark midnight, when even the stars were not to be seen, and thinking that it was the tiger and not knowing it, he cut off the head of the cow (Kapila) of brown complexion.