Valmiki Ramayana Yuddha Kanda Sarga 59 Shloka 132

एतेन by me, अद्भुतदर्शनानि of fierce form, जनस्थानकृतालयानि taken abode at Janasthana, अत्तवरायुधानि used choicest weapons, चतुर्धशानि fourteen, रक्षःसहस्राणि thousands of Rakshasas, शरैः weapons, निषूदितानि were destroyed by me.

"By me, who is your adversary, fourteen thousand Rakshasas of fierce forms, who had taken abode at Janasthana and used choicest weapons were exterminated."