Valmiki Ramayana Sundara Kanda Sarga 21 Shloka 10
Original Shlokaवचो मिथ्याप्रणीतात्मा पथ्यमुक्तं विचक्षणैः।।5.21.10।। राक्षसानामभावाय त्वं वा न प्रतिपद्यसे।
1 source checked for this shloka
मिथ्याप्रणीतात्मा indulging in unrighteous act, त्वम् you, विचक्षणैः who have sense of discrimination, उक्तम् spoken, पथ्यम् proper advice, वचः words, राक्षासानाम् of demons, अभावाय for destruction, न प्रतिपद्यसे you do not agree.
"You are indulging in unrighteous act and not listening to the advice of wise men who have a sense of discrimination. You are the cause of the destruction of demons.