Valmiki Ramayana Ayodhya Kanda Sarga 35 Shloka 20

ततः then, शयने near his bed, जृम्भस्य of 'Jrumbha' (an ant or a bird of theis name), विरुतात् from its sound, भावः its meaning, भूरिवर्चसः highly brilliant, ते पितुः to your father, विदितः was known, तत्र on that, सः he, बहुधा repeatedly, अहसत् laughed.

Then one day near his bed your highly brilliant father laughed repeatedly over what an ant or a bird said, for he knew the meaning from its sound.