That greatly improper act of Vasudeva was only successful on account of the prowess of the illustrious sons of Pandu.
वासुदेवेन तत् कर्म यथायुक्तं महत् कृतम्। सिद्धं च पाण्डुपुत्राणां प्रतापेन महात्मनाम्॥