Mahabharata 14.71.8

14.71.8

sa saṃbhārānsamāhṛtya nṛpo dharmātmajastadā |
nyavedayadameyātmā kṛṣṇadvaipāyanāya vai || 8 ||

"Vaisampayana continued, 'Thus addressed (by the Rishi), Yudhishthira, the son of Pandu, that lord of Earth, answered,--'So be it!'--and then, O monarch, he accomplished all that that utterer of Brahma had directed. All the articles necessary for the sacrifice, O king, were duly procured. The royal son of Dharma, possessed of immeasurable soul, having procured all the necessaries, informed the Island-born Krishna of it. Then Vyasa of great energy said unto the royal son of Dharma,--'As regards ourselves, we are all prepared to initiate thee in view of the sacrifice. Let the Sphya and the Kurcha and all the other articles that, O thou of Kuru's race, may be needed for thy sacrifice, be made of gold. Let the horse also be loosened today, for roaming on the Earth, agreeably to the ordinances of the scriptures. Let the animal, duly protected, wander over the Earth.'