The two sons of Madri protected the sides of Yudhishthira and then they ran towards Karna so that he might not kill the king.
चक्ररक्षौ तु पार्थस्य माद्रीपुत्रौ परंतपौ। तावप्यधावतां कर्ण राजानं मा वधीरिति॥