Ramayana
बिभीषणश्च रक्षोभिः कामगैर्बहुभिर्वृतः । अश्वमेधं महायज्ञमायात्वतुलविक्रमः ॥ 7-91-11 ॥
And let Vibhishana of unequalled valour, surrounded by his many rakshasas who travel at will, come to the great sacrifice, the horse-sacrifice.
english translation