Quran 49:14 from Surah Al-Hujuraat on Divine Marvels.
۞قَالَتِ ٱلۡأَعۡرَابُ ءَامَنَّاۖ قُل لَّمۡ تُؤۡمِنُواْ وَلَٰكِن قُولُوٓاْ أَسۡلَمۡنَا وَلَمَّا يَدۡخُلِ ٱلۡإِيمَٰنُ فِي قُلُوبِكُمۡۖ وَإِن تُطِيعُواْ ٱللَّهَ وَرَسُولَهُۥ لَا يَلِتۡكُم مِّنۡ أَعۡمَٰلِكُمۡ شَيۡـًٔاۚ إِنَّ ٱللَّهَ غَفُورٞ رَّحِيمٌ
English translation: Say the Bedouins We believe Say Not you believe but say We have submitted and has not yet entered the faith in your hearts But if you obey Allah and His Messenger not He will deprive you of your deeds anything Indeed Allah (is) Oft-Forgiving Most Merciful
Transliteration: qalati al-a'rabu amanna qul lam tu'minu walakin qulu aslamna walamma yadkhuli al-imanu fi qulubikum wa-in tuti'u al-laha warasulahu la yalit'kum min a'malikum shayan inna al-laha ghafurun rahimun