Alas, why did Arjuna of pure deeds commit such a heinous crime, since he cut off the arm of a heedless warrior who was brave and used to perform sacrifices.
बीभत्सुरतिबीभत्सं कर्मेदमकरोत् कथम्। प्रमत्तस्य यदच्छत्सीद् बाहुं शूरस्य यज्वनः॥