  सीताया वचनं श्रुत्वा दशग्रीवः प्रतापवाम्।हस्ते हस्तं समाहत्य चकार सुमहद्वपुः।। 
 On hearing the Sitas words, the powerful Ravana struck his palms one over the other and assumed a huge form original figure. 