Mahabharata 3.214.17
षट्शिरा द्विगुणश्रोत्रो द्वादशाक्षिभुजक्रमःएकग्रीवस्त्वेककायः कुमारः समपद्यत
ṣaṭśirā dviguṇaśrotro dvādaśākṣibhujakramaḥekagrīvastvekakāyaḥ kumāraḥ samapadyata
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book