Mahabharata 3.13.16

निहत्य नरकं भौममाहृत्य मणिकुण्डलेप्रथमोत्पादितं कृष्ण मेध्यमश्वमवासृजः

nihatya narakaṃ bhaumamāhṛtya maṇikuṇḍaleprathamotpāditaṃ kṛṣṇa medhyamaśvamavāsṛjaḥ

Our plain-language meaning of this verse is waiting for scholar review.