Valmiki Ramayana Yuddha Kanda Sarga 48 Shloka 15

जनस्थानम् Janasthana, शोधयित्वा in search of me, प्रवृततिम् knowing my where about, उपलभ्यच to get me, अक्षोभ्यम् impossible, सागरम् ocean, तीर्त्वा crossing, भ्रातरौ brothers, गोष्पदे maya of Indrajith which is like foot print of cow's hoof, हतौ killed.

"Having gained Janasthana and crossing the ocean which is impossible knowing about my whereabouts and getting me is impossible since the brothers have been killed by the maya of Indrajith whose footprints are like a cow's hoof."