Valmiki Ramayana Aranya Kanda Sarga 26 Shloka 37

महासत्त्वाः mighty, घोराः dreadful, दुर्विषहाः intolerable, सर्वे all, शेषाः the remaining, ते they, लक्ष्मणस्य Lakshmana's, अग्रजेन by the elder brother, रणमूर्धनि on the battle front, हताः were killed.

The rest of the mighty, dreadful, intolerable demons were killed on the war front by Rama, elder brother to Lakshmana.