Mahabharata 3.207.18

ज्ञात्वा प्रथमजं तं तु वह्नेराङ्गिरसं सुतम्उपेत्य देवाः पप्रच्छुः कारणं तत्र भारत

jñātvā prathamajaṃ taṃ tu vahnerāṅgirasaṃ sutamupetya devāḥ papracchuḥ kāraṇaṃ tatra bhārata

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