Al-Hujuraat 49:14

The Bedouins say, “We have believed.” Say, “You have not believed, but say, ‘We have submitted,’ for faith has not yet entered your hearts[8]. But if you obey Allah and His Messenger, He will not detract anything from the reward of your deeds. Indeed, Allah is All-Forgiving, Most Merciful.”

[8] There is a distinction between Islam and Imān (faith). Imān is a higher degree than Islam. This distinction is mentioned in an authentic Hadīth of the Prophet (ﷺ), known as the Hadīth of Gabriel.

The bedouins say, "We have believed." Say, "You have not [yet] believed; but say [instead], 'We have submitted,' for faith has not yet entered your hearts. And if you obey Allāh and His Messenger, He will not deprive you from your deeds[1522] of anything. Indeed, Allāh is Forgiving and Merciful."

[1522] i.e., the reward thereof.

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 (صلى الله عليه وسلم), He will not decrease anything in reward for your deeds. Verily, Allâh is Oft-Forgiving, Most Merciful."

The wandering Arabs say: We believe. Say (unto them, O Muhammad): Ye believe not, but rather say "We submit," for the faith hath not yet entered into your hearts. Yet, if ye obey Allah and His messenger, He will not withhold from you aught of (the reward of) your deeds. Lo! Allah is Forgiving, Merciful.