 निःश्वसन्तं यथा नागं रावणं वानरर्षभः।आसाद्य परमोद्विग्नस्सोपासर्पत्सुभीतवत्।। 
 Having reached Ravana, who was breathing hissing like a snake, Hanuman was for a moment frightened and drew away from him as if he was put to terrible fear. 