O Mahārāja Parīkṣit, to glorify Mahārāja Nābhi the old sages composed two verses. One of them is this: “Who can attain the perfection of Mahārāja Nābhi? Who can attain his activities? Because of his devotional service, the Supreme Personality of Godhead agreed to become his son.”
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
यस्य ह पाण्डवेय श्लोकावुदाहरन्ति - को नु तत्कर्म राजर्षेर्नाभेरन्वाचरेत्पुमान् । अपत्यतामगाद्यस्य हरिः शुद्धेन कर्मणा
yasya ha pāṇḍaveya ślokāvudāharanti - ko nu tatkarma rājarṣernābheranvācaretpumān | apatyatāmagādyasya hariḥ śuddhena karmaṇā
SB 5.4.6