The Quran

۞ قالَتِ الأَعرابُ آمَنّا ۖ قُل لَم تُؤمِنوا وَلٰكِن قولوا أَسلَمنا وَلَمّا يَدخُلِ الإيمانُ في قُلوبِكُم ۖ وَإِن تُطيعُوا اللَّهَ وَرَسولَهُ لا يَلِتكُم مِن أَعمالِكُم شَيئًا ۚ إِنَّ اللَّهَ غَفورٌ رَحيمٌ

(Saheeh International)

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 deeds¹ of anything. Indeed, Allāh is Forgiving and Merciful."

i.e., the reward thereof.