Mahabharata 4.9.8

4.9.8

sahadeva uvāca |
pañcānāṃ pāṇḍuputrāṇāṃ jyeṣṭho rājā yudhiṣṭhiraḥ |
tasyāṣṭaśatasāhasrā gavāṃ vargāḥ śataṃ śatāḥ || 8 ||

"Sahadeva answered, 'Yudhishthira, the eldest of the five sons of Pandu, had one division of kine numbering eight hundred and ten thousand, and another, ten thousand, and another, again, twenty thousand, and so on. I was employed in keeping those cattle. People used to call me Tantripala. I know the present, the past, and the future of all kine living within ten Yojanas, and whose tale has been taken. My merits were known to that illustrious one, and the Kuru king Yudhishthira was well-pleased with me. I am also acquainted with the means which aid kine in multiplying within a short time, and by which they may enjoy immunity from disease. Also these arts are known to me. I can also single out bulls having auspicious marks for which they are worshipped by men, and by smelling whose urine, the barren may conceive.'