Valmiki Ramayana Yuddha Kanda Sarga 88 Shloka 14

दुर्मते evil minded, हीनार्थः meaningless, सःत्वम् you are, केनचित् for any one, दुरवापस्य difficult to do, अर्धस्य capacity to do, वाचा by words, व्याहृत्य talking, कृतार्थः succeeded, अस्मि I am, इति thus, जानीषे thinking

"O evil minded one! Your claim, in words that you have the capacity to do which is difficult for others is meaningless. Though you lack the capacity to succeed you are only thinking that you have succeeded."