Mahabharata 1.5.6

इमं वंशमहं ब्रह्मन्भार्गवं ते महामुनेनिगदामि कथायुक्तं पुराणाश्रयसंयुतम्

imaṃ vaṃśamahaṃ brahmanbhārgavaṃ te mahāmunenigadāmi kathāyuktaṃ purāṇāśrayasaṃyutam

Our plain-language meaning of this verse is waiting for scholar review.