Horus Behdety tells his father, Ra-Horakhty, that Seth’s followers are conspiring against him, and he becomes the winged disk to punish them.
Myths and Legends of Ancient Egypt: Horus Behdety and the Winged Disk

Horus Behdety tells his father, Ra-Horakhty, that Seth’s followers are conspiring against him, and he becomes the winged disk to punish them.