Valmiki Ramayana Yuddha Kanda Sarga 69 Shloka 61
Original Shlokaरथेन च रथंचापिवारणेनैववारणम् ।।6.69.61।। हयेन च हयंकेचिन्निजघ्नुर्वानरारणे ।
1 source checked for this shloka
रणे in the battlefield, केचित् , some वानराः Vanaras, रथेन on chariot, रथम् another chariot, वारणेनापि elephant, वारणम् with another elephant, हयेन horse, हयम् with another horse, निजघ्नुः struck.
In the battlefield a chariot with another chariot, an elephant with another elephant, a horse with another horse struck one another.