Fuṣṣilat

إِنَّ الَّذِينَ آمَنُوا وَعَمِلُوا الصَّالِحَاتِ لَهُمْ أَجْرٌ غَيْرُ مَمْنُونٍ

8. Indeed, those who believe and do righteous good deeds, for them will be an endless reward that will never stop.

Faith and righteous good deeds are inseparable. Those who do righteous good deeds in this world without expecting any reward will avail themselves of Divine Bounties and Rewards. God Almighty grants His Rewards non gratia. It would be unbefitting to expect remuneration for our insignificant favors. The blessed Verse is saying that believers enjoy permanent and endless rewards. Some Qur’anic exegets maintain that mamnun designates expecting reward or remuneration and some others take it in the sense of innumerable and endless. There are still some other exegets holding that the sustenance granted to believers is non gratia and the Provider does not denigrate His Favors.

It is worthy of note that God Almighty is Most-Bountiful and Most-Gracious and belief and righteous good deeds are both possible through His Favor and the Rewards promised to believers are all fulfilled through His Grace and Bounty. Despite doing righteous good deeds, servants are not worthy of compensation since it is their obligation as servants to serve their Lord. However, the blessed Verse in question is saying that those who believe and do righteous good deeds will be granted permanent and endless rewards non-gratia.