Yudhishthira said : O great Rishi, whose sons were Sunda and Upasunda? How did their dissension arise and why did they kill each other?
युधिष्ठिर उवाच सुन्दोपसुन्दावसुरौ कस्य पुत्रौ महामुने। उत्पन्नश्च कथं भेदः कथं चान्योन्यमनताम्॥