Valmiki Ramayana Yuddha Kanda Sarga 57 Shloka 39

दक्षिणामुखः facing south, केतोः banner, मूर्धनि top, निलीनः surrounded, गृध्रः vulture, अस्य its, उभयतः both, पार्श्वम् sides, तुदन् scratching, समग्राम् entire, श्रियम् prosperity, अहरत् snatched.

Seeing a vulture sitting on the banner (of Prahastha) facing south scratching both sides, Prahastha became pale as if the entire prosperity had been snatched away.