Valmiki Ramayana Yuddha Kanda Sarga 88 Shloka 35

युधि in combat, दुष्प्रधर्षणौ clashed displaying, तौवीरौ both heroes, तदा then, नभोगतौ shining in heaven, ग्रहाविव like planets, बलवृत्राविव like Indra and Vrta fought, अभीतौ difficult to overcome, युयुधाते fought

In the combat both the heroes fought displaying their might, shone like two planets in the heaven and fought like Indra and Vrta and were difficult to overcome.