Valmiki Ramayana Aranya Kanda Sarga 64 Shloka 66
Original Shlokaआकर्णपूर्णैरिषुभिर्जीवलोकं दुरावरैः। करिष्ये मैथिलीहेतोरपिशाचमराक्षसम्।।3.64.66।।
1 source checked for this shloka
मैथिलीहेतोः for the sake of Maithili, जीवलोकम् this world of mortals, आकर्णपूर्णैः fully drawing up to the ears, दुरावरैः by the irresistible, इषुभिः arrows, अपिशाचम् devoid of evil spirits, अराक्षसम् without demons, करिष्ये will do.
For the sake of Maithili I will render this world devoid of goblins and demons with my irresistible arrows pulled up to my ears.