Valmiki Ramayana Yuddha Kanda Sarga 55 Shloka 11

सुदिने good day, काले at a time, रूक्षमारुतम् fine wea the r, दुर्दिनम् cloudy, अभवत् became, सर्वे all over, खगमृगाः birds and beasts, क्रूराः cruel, भयावहाः frightening, वाचः words, ऊचुः cries.

At a time on a good day of fine weather, it became cloudy, birds and beasts were making frightening cries all over.