You have not been their slayer, nor this Bhima, nor Arjuna, nor the twins. It is Time that took away their lives according to the great law of change.
न त्वं हन्ता च भीमोऽयं नार्जुनो न यमावपि। कालः पर्यायधर्मेण प्राणानादत्त देहिनाम्॥