“At three-thirty that afternoon, Harry, Ron and the other Gryffindors hurried down the front steps into the grounds for their first flying lesson. It was a clear, breezy day and the grass rippled under their feet as they marched down the sloping lawns.” - Harry Potter and The Philosophers Stone.
“It's leviOsa, not levioSA! She’s a nightmare, honestly! No wonder she hasn't got any friends.” - Harry Potter and The Philosophers Stone