Slappy- Put to Sleep Again, Again, Again

He tried to jump up. But I kept him pinned to the bed. And I shouted the words as loudly as I could:
“KARRU MARRI ODONNA LOMA MOLONU KARRANO.”
Would it put the evil dummy to sleep?
“Sorry,” Slappy said. “That doesn’t work.”
...

“That doesn’t work,” Slappy said. “I … I …”
He collapsed and slumped onto his back. His eyelids slid down over his eyes. His mouth shut tight with a loud wooden click. His arms and legs went limp.
Lizzie stepped up beside me. We both stared at him without speaking, waiting for him to sit up, to open his eyes … to move.
But he didn’t.
“It worked!” I cried. “He’s totally asleep.”

- My Friend Slappy, chapters 35 and 36