This very subject was ushered by the highly blessed Partha to Narada in the midst of the Rishis and in the presence of Krishna and Bhishma.
एतदर्थं महाराज पृष्टः पार्थेन नारदः। ऋषिमध्ये महाभागः शृण्वतोः कृष्णभीष्मयोः॥