sincerity of intention (ikhlas)

وَقُلِ ٱعْمَلُوا۟ فَسَيَرَى ٱللَّهُ عَمَلَكُمْ وَرَسُولُهُۥ وَٱلْمُؤْمِنُونَ ۖ وَسَتُرَدُّونَ إِلَىٰ عَـٰلِمِ ٱلْغَيْبِ وَٱلشَّهَـٰدَةِ فَيُنَبِّئُكُم بِمَا كُنتُمْ تَعْمَلُونَ

And say, "Do [as you will], for Allāh will see your deeds, and [so will] His Messenger and the believers. And you will be returned to the Knower of the unseen and the witnessed, and He will inform you of what you used to do."

قَالَ يَـٰقَوْمِ أَرَءَيْتُمْ إِن كُنتُ عَلَىٰ بَيِّنَةٍ مِّن رَّبِّى وَرَزَقَنِى مِنْهُ رِزْقًا حَسَنًا ۚ وَمَآ أُرِيدُ أَنْ أُخَالِفَكُمْ إِلَىٰ مَآ أَنْهَىٰكُمْ عَنْهُ ۚ إِنْ أُرِيدُ إِلَّا ٱلْإِصْلَـٰحَ مَا ٱسْتَطَعْتُ ۚ وَمَا تَوْفِيقِىٓ إِلَّا بِٱللَّهِ ۚ عَلَيْهِ تَوَكَّلْتُ وَإِلَيْهِ أُنِيبُ

He said, "O my people, have you considered: if I am upon clear evidence from my Lord and He has provided me with a good provision from Him...? And I do not intend to differ from you in that which I have forbidden you; I only intend reform as much as I am able. And my success is not but through Allāh. Upon Him I have relied, and to Him I return.

وَلَا تَمْنُن تَسْتَكْثِرُ

And do not confer favor to acquire more.