Surah Assaaffat ayat 121 Tafsir Quran 37:121

﴿إِنَّا كَذَٰلِكَ نَجْزِي الْمُحْسِنِينَ﴾
[ الصافات: 121]

37:121 Indeed, We thus reward the doers of good.

So just as We rewarded them both do We reward the virtuous.

For thus do We requite those who perfect their illustrious toils and turn their thoughts on moral excellence and benevolence and imprint their deeds with wisdom and piety

Musa and Harun Allah tells us how He blessed Musa and Harun with prophethood and how He saved them, along with those who believed, from the oppression of Fir`awn and his people, who had persecuted them by killing their sons and sparing their women, and by forcing them to do the most menial tasks, then ultimately He caused them to prevail over them and to seize their lands and their wealth and all that they had spent their entire lives amassing.
Then Allah revealed to Musa the Clear and Mighty Book, which is the Tawrah, as Allah says: وَلَقَدْ ءَاتَيْنَا مُوسَى وَهَـرُونَ الْفُرْقَانَ وَضِيَآءً ( And indeed We granted to Musa and Harun the criterion (of right and wrong ), and a shining light) ( 21:48 ).
And Allah says here: وَءَاتَيْنَـهُمَا الْكِتَـبَ الْمُسْتَبِينَ - وَهَدَيْنَـهُمَا الصِّرَطَ الْمُسْتَقِيمَ ( And We gave them the clear Scripture; and guided them to the right path. ) meaning, with regard to words and deeds. وَتَرَكْنَا عَلَيْهِمَا فِى الاٌّخِرِينَ ( And We left for them among the later generations. ) means, that after they died they would be mentioned in good terms and spoken of highly.
Then Allah explain this further: سَلَـمٌ عَلَى مُوسَى وَهَـرُونَ إِنَّا كَذَلِكَ نَجْزِى الْمُحْسِنِينَ إِنَّهُمَا مِنْ عِبَادِنَا الْمُؤْمِنِينَ ( Salam (peace! ) be upon Musa and Harun! Verily, thus do We reward the doers of good.
Verily, they were two of Our believing servants.) وَإِنَّ إِلْيَاسَ لَمِنَ الْمُرْسَلِينَ - إِذْ قَالَ لِقَوْمِهِ أَلاَ تَتَّقُونَ - أَتَدْعُونَ بَعْلاً وَتَذَرُونَ أَحْسَنَ الْخَـلِقِينَ - اللَّهَ رَبَّكُمْ وَرَبَّ ءَابَآئِكُمُ الاٌّوَّلِينَ - فَكَذَّبُوهُ فَإِنَّهُمْ لَمُحْضَرُونَ إِلاَّ عِبَادَ اللَّهِ الْمُخْلَصِينَ

Musa and Harun Allah tells us how He blessed Musa and Harun with prophethood and how He saved them, along with those who believed, from the oppression of Fir`awn and his people, who had persecuted them by killing their sons and sparing their women, and by forcing them to do the most menial tasks, then ultimately He caused them to prevail over them and to seize their lands and their wealth and all that they had spent their entire lives amassing.
Then Allah revealed to Musa the Clear and Mighty Book, which is the Tawrah, as Allah says: وَلَقَدْ ءَاتَيْنَا مُوسَى وَهَـرُونَ الْفُرْقَانَ وَضِيَآءً ( And indeed We granted to Musa and Harun the criterion (of right and wrong ), and a shining light) ( 21:48 ).
And Allah says here: وَءَاتَيْنَـهُمَا الْكِتَـبَ الْمُسْتَبِينَ - وَهَدَيْنَـهُمَا الصِّرَطَ الْمُسْتَقِيمَ ( And We gave them the clear Scripture; and guided them to the right path. ) meaning, with regard to words and deeds. وَتَرَكْنَا عَلَيْهِمَا فِى الاٌّخِرِينَ ( And We left for them among the later generations. ) means, that after they died they would be mentioned in good terms and spoken of highly.
Then Allah explain this further: سَلَـمٌ عَلَى مُوسَى وَهَـرُونَ إِنَّا كَذَلِكَ نَجْزِى الْمُحْسِنِينَ إِنَّهُمَا مِنْ عِبَادِنَا الْمُؤْمِنِينَ ( Salam (peace! ) be upon Musa and Harun! Verily, thus do We reward the doers of good.
Verily, they were two of Our believing servants.) وَإِنَّ إِلْيَاسَ لَمِنَ الْمُرْسَلِينَ - إِذْ قَالَ لِقَوْمِهِ أَلاَ تَتَّقُونَ - أَتَدْعُونَ بَعْلاً وَتَذَرُونَ أَحْسَنَ الْخَـلِقِينَ - اللَّهَ رَبَّكُمْ وَرَبَّ ءَابَآئِكُمُ الاٌّوَّلِينَ - فَكَذَّبُوهُ فَإِنَّهُمْ لَمُحْضَرُونَ إِلاَّ عِبَادَ اللَّهِ الْمُخْلَصِينَ

( Lo! thus do We reward the good ) with words, deeds and good praise.

Verily, thus do We reward the Muhsinun (good-doers - see V. 2:112).

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