"Even four harnessed horses cannot bring imprudent words back into the mouth."

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That wand’s more trouble than it’s worth,” said Harry. “And quite honestly,” he turned away from the painted portraits, thinking now only of the four-poster bed lying waiting for him in Gryffindor Tower, and wondering whether Kreacher might bring him a sandwich there, “I’ve had enough trouble for a lifetime.

— J. K. Rowling