Valmiki Ramayana Aranya Kanda Sarga 56 Shloka 6

घोररूपाः of dreadful forms, महाबलाः very strong , ये those, एते such of, राक्षसाः demons, प्रोक्ताः has been said, सर्वे all, सुपर्णे Suparna, पन्नगाः serpents, यथा like, राघवे with regard to Rama, निर्विषाः are devoid of poison.

Those dreadful, mighty demons you have described are ineffective in his presence just like the serpents who with their venom are ineffective in the presence of Suparna (Garuda).