Ramayana
शिखरे तस्य शैलस्य मध्यमे ऽम्बुदसन्निभे । शकुनैरपि दुष्प्रापे टङ्कच्छिन्नचतुर्दिशि ॥ 7-5-24 ॥
Upon the middle peak of that mountain — resembling a rain-cloud, unreachable even by birds, its four sides cut sheer as if carved with a chisel —
english translation