In the book Phantom Tollbooth, where is this quote found?

Page and chapter if you may.

here's the quote ⇅

"You can get into a lot of trouble mixing up words or just not knowing how to spell them."

GIVING AWAY FREE BRAIN THING FOR THE RIGHT/FIRST ANSWER!! ^_^

LANGUAGE ARTS

6TH GRADE
Please help i only need the chapter and the page #.