Yudhishthira said O Shalya, this was the boon I asked during the preparations for this battle. The prowess of the Suta's son (Karna) should be weakened by you in battle.
युधिष्ठिर उवाच स एव मे वरः शल्य उद्योगे यस्त्वया कृतः। सूतपुत्रस्य संग्रामे कार्यस्तेजोवधस्त्वया॥