“Why’m I with you?” grunted the Harry near the back door.
“Because you’re the one that needs watching,” growled Moody, and sure enough, his magical eye did not waver from Mundungus as he continued, “Arthur and Fred —”
“I’m George,” said the twin at whom Moody was pointing. “Can’t you even tell us apart when we’re Harry?”
“Sorry, George —”
“I’m only yanking your wand, I’m Fred really —”
“Enough messing around!” snarled Moody. “The other one — George or Fred or whoever you are — you’re with Remus.”
Harry Potter and the Deathly Hallows – J.K. Rowling
Harry descended the stairs, very conscious of everybody still staring at him, stowing his wand in the back pocket of his jeans as he came.
“Don’t put your wand there, boy!” roared Moody. “What if it ignited? Better wizards than you have list buttocks, you know!”
“Who d’you know who’s lost a buttock?” the violet-haired woman asked Mad-Eye interestedly.
“Never you mind, you just keep your wand out of your back pocket!” growled Mad-Eye. “Elementary wand safety, nobody bothers about it anymore. . . .” He stumped off toward the kitchen. “And I saw that,” he added irritably, as the woman rolled her eyes at the ceiling.
Harry Potter and the Order of the Phoenix – J.K. Rowling