Bhishma said If indeed you can not cast off the fierce hostility you have imbibed against the Pandavas, then O Karna, I accord you my permission. Fight, actuated by a desire for attaining paradise.
भीष्म उवाच न चेच्छक्यमवस्रष्टुं वैरमेतत् सुदारुणम्। अनुजानामि कर्ण त्वां युद्ध्यस्व स्वर्गकाम्यया॥