Mahabharata 7.164.17
द्वाभ्यां द्वाभ्यां यमौ सार्धं रथाभ्यां रथपुंगवौसमासक्तौ ततो द्रोणं धृष्टद्युम्नोऽभ्यवर्तत
dvābhyāṃ dvābhyāṃ yamau sārdhaṃ rathābhyāṃ rathapuṃgavausamāsaktau tato droṇaṃ dhṛṣṭadyumno'bhyavartata
Our plain-language meaning of this verse is waiting for scholar review.