Mahabharata 9.6.36

भीष्मद्रोणार्णवं तीर्त्वा कर्णपातालसंभवम्मा निमज्जस्व सगणः शल्यमासाद्य गोष्पदम्

bhīṣmadroṇārṇavaṃ tīrtvā karṇapātālasaṃbhavammā nimajjasva sagaṇaḥ śalyamāsādya goṣpadam

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