Mahabharata 12.29.60
सहस्रमश्वा एकैकं हस्तिनं पृष्ठतोऽन्वयुःगवां सहस्रमश्वेऽश्वे सहस्रं गव्यजाविकम्
sahasramaśvā ekaikaṃ hastinaṃ pṛṣṭhato'nvayuḥgavāṃ sahasramaśve'śve sahasraṃ gavyajāvikam
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book