Ramayana
अपविद्धास्तु ते वीरा विनिष्पेतुः पदातयः । महापङ्कमिवासाद्य कुञ्जराष्षष्टिहायनाः ॥ 7-23-46 ॥
Those heroes, struck down and hurled from their mounts, fell to the ground as foot-soldiers, like sixty-year-old elephants that have plunged into a great mire.
english translation