Valmiki Ramayana Yuddha Kanda Sarga 91 Shloka 5
Original Shlokaतमसाबहुलेनेमास्सम्सक्तांसर्वतोदिशः । नेहविज्ञायतेस्वोवापरोवारक्षसोत्तमाः ।।6.91.5।।
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राक्षसोत्तमाः foremost of Rakshasas, इमाः these, दिशःdirections, सर्वतंबहुलेन all over spread, तमसा darkness, सम्सक्ताः therefore, इह now, स्वोवा one's own, परोवा or enemies, न विज्ञायते not able to know
" As all directions are spread with darkness now it is not possible to know who one's own is or others at this time."