Regarding this subject is cited an old history, viz., the discourse that Brihaspati, asked by Indra, delivered to him.
वैशम्पायन उवाच अत्रैवोदाहरन्तीममितिहासं पुरातनम्। इन्द्रेण समये पृष्टो यदुवाच बृहस्पतिः॥