General Behavior (Kitab Al-Adab)
Dawud :: Book 41 : Hadith 5054
Narrated A man:
AbuSallam told that he was in the mosque of Hims. A man passed him and the people said about him that he served the Prophet (peace_be_upon_him).
He (AbuSallam) went to him and said: Tell me any tradition which you heard from the Apostle of Allah (peace_be_upon_him) and there were no man between him and you. He said: I heard the Apostle of Allah (peace_be_upon_him) say: If anyone says in the morning and in the evening: "I am pleased with Allah as Lord, with Islam as religion, with Muhammad as Prophet," Allah will certainly please him.