Ramayana
सुपर्णं गिरिसङ्काशं वैनतेयमथास्थितः । राक्षसानामभावाय ययौ तूर्णतरं प्रभुः ॥ 7-6-65 ॥
Mounted then upon Garuda, son of Vinata, mountain-like in size, the Lord went forth with the utmost speed for the destruction of the Rakshasas.
english translation