Mahabharata 13.14.54

विष्णोश्चक्रं च तद्घोरं वज्रमाखण्डलस्य चशीर्णं पुराभवत्तात ग्रहस्याङ्गेषु केशव

viṣṇoścakraṃ ca tadghoraṃ vajramākhaṇḍalasya caśīrṇaṃ purābhavattāta grahasyāṅgeṣu keśava

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