In the name of Allah, Most Gracious, Most Merciful.
13. O mankind! We have created you from a male and a female, and made you into nations and tribes, that you may know one another. Verily, the most honourable of you with Allâh is that (believer) who has At-Taqwa [i.e. one of the Muttaqûn (pious – see V.2:2)]. Verily, Allâh is All-Knowing, All-Aware.
14. The bedouins say: “We believe.” Say: “You believe not but you only say, ‘We have surrendered (in Islâm),’ for Faith has not yet entered your hearts. But if you obey Allâh and His Messenger, He will not decrease anything in reward for your deeds. Verily, Allâh is Oft-Forgiving, Most Merciful.”
15. Only those are the believers who have believed in Allâh and His Messenger, and afterward doubt not but strive with their wealth and their lives for the Cause of Allâh. Those! They are the truthful.
Sura 49. Al-Hujuraat (The Dwellings)