Wyrd Sisters (Discworld, #6; Witches, #2)

by Terry Pratchett

“You’re—you’re not going to force me to go back, are you?” he said. “Um?” said the duke. He waved a hand irritably. “No, no,” he said. “Not at all. Just call in at the torturer on your way out. See when he can fit you in.” The taxman gave him a look of gratitude, and bobbed a bow.