Ramayana
उत्तरे सागरे सन्ध्यामुपासित्वा दशाननम् । वहमानो ऽगमद्वाली पूर्वं वै स महोदधिम् ॥ 7-34-31 ॥
Having performed the twilight worship at the northern ocean while still carrying the Ten-faced one, Vali then went to the great eastern sea.
english translation