Al-Hujurat 49:18 ان الله يعلم غيب السماوات والارض والله بصير بما تعملون ١٨

There is a Difference between a Believer and a Muslim

Allah chastises the bedouins who, when they embraced Islam, claimed for themselves the grade of faithful believers. However, Faith had not yet firmly entered their hearts,

قَالَتِ الاٌّعْرَابُ ءَامَنَّا قُل لَّمْ تُؤْمِنُواْ وَلَكِن قُولُواْ أَسْلَ