Indeed, Vasudeva and Dhananjaya, having like lotus petals, practised severe austerities for three entire cycles. I have learnt this from Narada and Vyasa, O king.
त्रियुगौ पुण्डरीकाक्षौ वासुदेवधनञ्जयौ। विदितौ नारदादेतौ मम व्यासाञ्ज पार्थिव॥