Mahabharata 6.77.21

मण्डलं तु समालोक्य व्यूहं परमदारुणम्स्वयं युधिष्ठिरो राजा व्यूहं वज्रमथाकरोत्

maṇḍalaṃ tu samālokya vyūhaṃ paramadāruṇamsvayaṃ yudhiṣṭhiro rājā vyūhaṃ vajramathākarot

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