Valmiki Ramayana Aranya Kanda Sarga 36 Shloka 5

भीमकर्मणाम् of terrible deeds, शूराणाम् of heroes, लब्धलक्षाणाम् skilled in hitting the targets, खरचित्तानुवर्तिनाम् acting according to the will of Khara, रक्षसाम् of demons, चतुर्दश सहस्राणि fourteen thousand.

These fourteen thousand heroes, perpetrators of terrible deeds, skilled in hitting the targets had been acting according to the direction of Khara.