Valmiki Ramayana Yuddha Kanda Sarga 65 Shloka 24

तस्मात् therefore, सैन्यैः army, परिवृतः surrounded, परमदुर्धर्षै: extremely difficult to encounter, रक्षसाम् for Rakshasas, अहितम् not favourable, सर्वम् all, शत्रुपक्षम् enemy side, निषूदय destroy.

"Therefore, go surrounded by the army. They are extremely difficult to encounter. They are like thunderbolts. Destroy them who are on the enemy side and not favourable to Rakshasas."