Sahih Muslim | Book 1 | Chapter 12

Narrated by 'Abbas b. 'Abdul-Muttalib
It is narrated on the authority of 'Abbas b. 'Abdul-Muttalib that he heard the Messenger of Allah saying: He relished the flavour of faith (Iman) who became the book of faith pleased with Allah as Lord, with al-Islam as the code of life and with Muhammad as the Messenger (of Allah).