Harry learned that there were seven hundred ways of committing a Quidditch foul and that all of them had happened during a World Cup match in 1473; that Seekers were usually the smallest and fastest players, and that most serious Quidditch accidents seemed to happen to them; that although people rarely died playing Quidditch, referees had been known to vanish and turn up months later in the Sahara Desert.
There are no more uses of "Sahara" in the book.
Show samples from other sources
As Finn cooked the bacon and pancakes, he tried to keep me distracted by chattering about his years as an apprentice chef at an emir’s palace in the middle of the Sahara Desert.
Laurie Halse Anderson -- The Impossible Knife of Memory
I was thinking of heading to the Sahara kickoff thing.