In creating the Dr. Seuss page, I wanted to have an excerpt, so I grabbed a book and chose a scene _at random_. The scene I chose was the end of Fox In Socks; where Knox can no longer stand the tongue-twisting blabber of the Fox, and shoves him into the tweedle beetles' puddle bottle. He describes this as
As soon as I saw it on the screen, I knew that this was the source of the phrase. It is interesting to note that it is the part of the line where Knox stops describing the situation and just starts ranting.