Skandapurana 6.3.73.23

6.3.73.23

nīrogo rūpavāṃścaiva vidyāḍhyaḥ satyavākśuciḥ .
goprekṣeśvaramāhātmyaṃ mayā khyātaṃ yudhiṣṭhira .
godehānniḥsṛtaṃ liṅgaṃ kāśī: gaṃgā taṭe .. 73.23 ..

Free from disease, handsome, rich in learning, speaking the truth, and pure.
The Goprekṣeśvara-māhātmya has thus been declared by me, O Yudhiṣṭhira;
the liṅga emerged from the body of a cow on the bank of the Gaṅgā in Kāśī.