 स तु मेधाविनौ दृष्ट्वा वेदेषु परिनिष्ठितौ।वेदोपबृंहणार्थाय तावग्राहयत प्रभु:।।  
  Valmiki, the master, having found both Kusa and Lava endowed with intellect and accomplished in the Vedas initiated them into the Ramayana composed by him for the purpose of nourishing the Vedas. 