Valmiki Ramayana Yuddha Kanda Sarga 40 Shloka 22

अन्योन्यसूदने intending to destroy each other, यत्तौ approaching each other, तौ both, परस्परम् one another, आसाद्य to kill, भक्ष्यार्थे for the sake of food, मार्जाराविव like cats, मुहुर्मुहुः again and again, अवितस्थाते falsely.

Both of them intent on destroying each other were approaching one another and now and then growling like cats for the sake of food.