Volume 1, Book 3, Number 94:
Whenever the Prophet asked permission to enter, he knocked the door thrice with greeting and whenever he spoke a sentence (said a thing) he used to repeat it thrice. (See Hadith No. 261, Vol. 8).
Why did Mohammad need to repeat what he said?
Was his repetition a form of mind control?
Was it because repetition makes something holy?
Did the Hadith's try to illustrate that Mohammad was a child (or an adult with a child like mentality)?
"Jacob Two-Two" is the main character of a children's novel written by Mordecai Richler. Jacob is the youngest child of five and has to say things twice because people don't hear him the first time. He is a 6-year-old boy who cannot ride a two-wheel bike, or cut bread, or cross the street, or run errands for his parents.