Some people came to our prophet and said that we are moomin (believer) or we believe (have imaan)....Allah sent wahi to prophet ...whose mafoom is Tell them they havent yet believed rather they have just entered islam In the Qur'an it is stated: (Al-Hujurat 49:14) The Arabs of the desert say, "We believe." (tu/minoo) Say thou: Ye believe not; but rather say, "We profess Islam;" (aslamna) for the faith (al-imanu) hath not yet found its way into your hearts. Hence there is a difference between muslim and believer? not in law, but in faith.