Valmiki Ramayana 6.3.4

6.3.4

balasya parimāṇaṃ ca dvāradurgakriyām api
gupti karma ca laṅkāyā rakṣasāṃ sadanāni ca

'Light were the task for thee, I ween,
To bridge the sea that gleams between
The mainland and the island shore.
Or dry the deep and guide as o'er.
Fain would I learn from thee whose feet
Have trod the stones of every street,
Of fenced Lanká's towers and forts,
And walls and moats and guarded ports,
And castles where the giants dwell,
And battlemented citadel.
O Váyu's son, describe it all,
With palace, fort, and gate, and wall.'