Hi Kading.
Anas (may Allaah Almighty be pleased with him) reported that when the Prophet, may Allah bless him and grant him peace, used to say something, he would repeat it three times so that it would be understood. When he came to a people, he would greet them three times." [al-Bukhari]
'A'isha (may Allaah Almighty be pleased with her) said, "The words of the Messenger of Allah, may Allah bless him and grant him peace, were clear words which could be understood by all who heard them." [Abu Dawud]
And obviously, he (peace be upon him) should be our role model, hence we should imitate him.
Peace.