सीताया वचनं श्रुत्वा दशग्रीवः प्रतापवाम्। हस्ते हस्तं समाहत्य चकार सुमहद्वपुः।।3.49.1।।
sītāyā vacanṃ śrutvā daśagrīvḥ pratāpavām| haste hastṃ samāhatya cakāra sumahadvapuḥ||3.49.1||
Translation
प्रतापवाम् powerful, दशग्रीवः tenheaded Ravana, सीतायाः Sita's, वचनम् words, श्रुत्वा having heard, हस्ते by the palm, हस्तम् palm, समाहत्य striking, सुमहत् very great, वपुः body, चकार assumed.
Meaning
On hearing the Sita's words, the powerful Ravana struck his palms one over the other and assumed a huge form (original figure).