“He put Harry’s wand back into its box and wrapped it in brown paper, still muttering, “Curious . . . curious . . .”
“Sorry,” said Harry, “but what’s curious?”
Mr. Ollivander fixed Harry with his pale stare.
“I remember every wand I’ve ever sold, Mr. Potter. Every single wand. It so happens that the phoenix whose tail feather is in your wand, gave another feather — just one other. It is very curious indeed that you should be destined for this wand when its brother — why, its brother gave you that scar.”
Harry swallowed.” - Harry Potter and the Sorcerer's Stone