Ramayana
तेषां संवदतामेवं श्रोतऽणां हर्षवर्धनम् । गेयं प्रचक्रतुस्तत्र तावुभौ मुनिदारकौ ॥ 7-94-14 ॥
While they were thus conversing, those two boys, the sons of the sage, began to perform there the song that increased the joy of the listeners.
english translation