Mahabharata 13.7.9

वाहनासनयानानि योगात्मनि तपोधनेअग्नीनुपशयानस्य राजपौरुषमुच्यते

vāhanāsanayānāni yogātmani tapodhaneagnīnupaśayānasya rājapauruṣamucyate

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