Karna, knowing as he did (the use of) mighty weapons, promised it in five nights. Hearing those words of the son of Suta, the son of the ocean, going (Ganga),
कर्णस्तु पञ्चरात्रेण प्रतिजज्ञे महास्त्रवित्। तच्छ्रुत्वा सूतपुत्रस्य वाक्यं सागरगासुतः॥