Valmiki Ramayana Yuddha Kanda Sarga 91 Shloka 64
Original Shlokaभैरवाभिरुतेभीमेयुद्धेवानरक्षसाम् । भूतैर्बहुभिराकाशंविस्मितैरावृतंबभौ ।।6.91.64।।
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वानररक्षसाम् Vanaras and Rakshasas, भैरवाभिरुते frightful, भीमे fierce, युद्धे battle, विस्मितैः astonished, बहुभिः many, भूतैःbeings, आवृतम् surrounded, आकाशम् in the sky, बभौ charming
As the frightful war between Vanaras and Rakshasas went on, many beings surrounded in the sky were astonished and looked charming.