“O Prophet! Indeed, We have sent you as a witness and a bringer of good tidings and a warner. And one who invites to Allah, by His permission, and an illuminating lamp.” (Surah Al-Ahzab, 33/45-46) There is no god but Allah and Prophet Muhammad (s.a.w) is his servant and messenger. Every person who accepts Islam has to recite this. He was known as "Muhammadu'l Amin" in Mecca even before he became a Prophet. He was the epitome of virtue and morality. He never compromised on honesty.