Vidura also heard from Uddhava about the appearance and disappearance of Lord Kṛṣṇa, the Supersoul, in the mortal world, which is a subject matter sought after with great perseverance by the great sages.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
विदुरोऽप्युद्धवाच्छ्रुत्वा कृष्णस्य परमात्मनः । क्रीडयोपात्तदेहस्य कर्माणि श्लाघितानि च
viduro'pyuddhavācchrutvā kṛṣṇasya paramātmanaḥ | krīḍayopāttadehasya karmāṇi ślāghitāni ca
SB 3.4.33