Valmiki Ramayana Bala Kanda Sarga 1 Shloka 44

स: Rama, राक्षसानाम् for rakshsas (abode of), वने in that forest, तेषां to those asetics, तथा that prayer, प्रतिशुश्राव assented, ऋषीणाम् of the ascetics, अग्निकल्पानाम् in lustre resembling flaming fire, दण्डकारण्यवासिनाम् inhabitants of Dandakaranya, संयति in the battle, रक्षसाम् of rakshasas, वधश्च slaying also, रामेण by Rama, प्रतिज्ञातः was promised.

Rama promised those ascetics, who resembled flaming fire in lustre living in Dandakaranya inhabited by rakshasas to slay them.