Valmiki Ramayana Kishkindha Kanda Sarga 42 Shloka 19

वानराः monkeys, तत्र there, गतां on reaching, समुद्रे तु in the end of the sea, पारियात्रस्य of Pariyatra, शतयोजनाम् hundred yojanas, काञ्चनीम् golden, दुर्दर्शाम् difficult to see (because of its brilliance), कोटिम् tip, द्रक्ष्यथ you will see

'O monkeys you will see the dazzling golden tip of a mountain called Pariyatra towards the end of the sea. It is extended over a hundred yojanas and dificult to gaze because of its brilliance.