Valmiki Ramayana Yuddha Kanda Sarga 20 Shloka 36

तदा: then, रामः Rama, तत् that, परिदेवनम् lamentation, श्रुत्वा: having heard, नाघातयत् do not kill, दूतः envoy, आगतः come, मुच्यताम् set free, वानरान् to Vanaras, अब्रवीत् spoke.

"Having heard the lamentation, Rama said to the Vanaras" Do not kill him. Set him free as he had come as an envoy." ।। इत्यार्षेवाल्मीकीयेश्रीमद्रामायणेआदिकाव्येयुद्धकाण्डेविंशस्सर्गः ।। This is the end of the twentieth sarga of Yuddha Kanda of the first epic the holy Ramayana composed by sage Valmiki.