 स हि देवैरुदीर्णस्य रावणस्य वधार्थिभिः।अर्थितो मानुषे लोके जज्ञे विष्णुस्सनातनः।। 
  Entreated by the devatas desirous of slaying arrogant Ravana, the eternal Visnu was indeed born in the mortal world as Rama. 