Valmiki Ramayana Bala Kanda Sarga 67 Shloka 1

महामुनि: great ascestic, विश्वामित्र: Visvamitra, जनकस्य Janaka's, वच: words, शृत्वा having listened, रामाय for Rama, धनु: bow, दर्शय show, इति saying so, पार्थिवम् addressing king, उवाच ह spoke.

At the words of Janaka, great ascetic Viswamitra said to the king, "Let the bow be shown to Rama". Rama strings the bow and breaks-- Janaka sends counsellors to Ayodhya to bring king Dasaratha