سُوْرَةُ فُصِّلَتۡ

Surah Fussilat (41) — Ayah 8

Explained in detail · Meccan · Juz 24 · Page 477

إِنَّ ٱلَّذِينَ ءَامَنُوا۟ وَعَمِلُوا۟ ٱلصَّـٰلِحَـٰتِ لَهُمْ أَجْرٌ غَيْرُ مَمْنُونٍ ﴿8﴾
Truly, those who believe (in the Oneness of Allâh, and in His Messenger Muhammad صلى الله عليه وسلم - Islâmic Monotheism) and do righteous good deeds, for them will be an endless reward that will never stop (i.e. Paradise).
إِنَّ inna Indeed
ٱلَّذِينَ alladhīna those who
ءَامَنُوا۟ āmanū believe
وَعَمِلُوا۟ waʿamilū and do
ٱلصَّـٰلِحَـٰتِ l-ṣāliḥāti righteous deeds
لَهُمْ lahum for them
أَجْرٌ ajrun (is) a reward
غَيْرُ ghayru never ending
مَمْنُونٍۢ mamnūnin never ending

Tafsir Taiseer ul-Quran (Facilitation of the Quran) is a comprehensive Quran commentary by Maulana Abdul Rahman Kilani, a renowned Salafi (Ahl al-Hadith) scholar from Pakistan. Known for his eloquent and accessible writing style, Kilani authored this tafsir with a focus on clarity — making Quranic meanings understandable to the common reader. The tafsir provides detailed historical context for verses related to battles and expeditions, and firmly refutes modernist ideologies using strong scriptural evidence. It is widely regarded as an invaluable resource for understanding the Quran and countering deviant interpretations. The tafsir is originally written in Urdu, translated to English by tohed.com.

8. Surely, those who believe and do righteous deeds will have a reward that will never be cut off [7].

[7]
The Literal Meaning of ﴿مَنَّ﴾:

﴿غيْرَ مَمْنُوْنٍ﴾ also has two meanings. The meaning of ﴿مَنَّ﴾ is for something to gradually diminish and come to an end, and for its continuity to be cut off; and its second meaning is to do a favor and to remind of that favor. The first meaning is clear from the translation. According to the second meaning, it would mean that whatever blessings the people of Paradise are granted, they will never be reminded of them as a favor.