3 ayahs containing: خير + كون + عمل
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4:128 وَإِنِ ٱمْرَأَةٌ خَافَتْ مِنۢ بَعْلِهَا نُشُوزًا أَوْ إِعْرَاضًا فَلَا جُنَاحَ عَلَيْهِمَآ أَن يُصْلِحَا بَيْنَهُمَا صُلْحًا وَٱلصُّلْحُ خَيْرٌ وَأُحْضِرَتِ ٱلْأَنفُسُ ٱلشُّحَّ وَإِن تُحْسِنُوا۟ وَتَتَّقُوا۟ فَإِنَّ ٱللَّهَ كَانَ بِمَا تَعْمَلُونَ خَبِيرًا
And if a woman fears ill usage or desertion on the part of her husband, there is no blame on them, if they effect a reconciliation between them, and reconciliation is better, and avarice has been made to be present in the (people's) minds; and if you do good (to others) and guard (against evil), then surely Allah is aware of what you do.
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28:84 مَن جَآءَ بِٱلْحَسَنَةِ فَلَهُۥ خَيْرٌ مِّنْهَا وَمَن جَآءَ بِٱلسَّيِّئَةِ فَلَا يُجْزَى ٱلَّذِينَ عَمِلُوا۟ ٱلسَّيِّـَٔاتِ إِلَّا مَا كَانُوا۟ يَعْمَلُونَ
Whoever brings good, he shall have better than it, and whoever brings evil, those who do evil shall not be rewarded (for) aught except what they did.
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33:19 أَشِحَّةً عَلَيْكُمْ فَإِذَا جَآءَ ٱلْخَوْفُ رَأَيْتَهُمْ يَنظُرُونَ إِلَيْكَ تَدُورُ أَعْيُنُهُمْ كَٱلَّذِى يُغْشَىٰ عَلَيْهِ مِنَ ٱلْمَوْتِ فَإِذَا ذَهَبَ ٱلْخَوْفُ سَلَقُوكُم بِأَلْسِنَةٍ حِدَادٍ أَشِحَّةً عَلَى ٱلْخَيْرِ أُو۟لَٰٓئِكَ لَمْ يُؤْمِنُوا۟ فَأَحْبَطَ ٱللَّهُ أَعْمَٰلَهُمْ وَكَانَ ذَٰلِكَ عَلَى ٱللَّهِ يَسِيرًا
Being niggardly with respect to you; but when fear comes, you will see them looking to you, their eyes rolling like one swooning because of death; but when the fear is gone they smite you with sharp tongues, being niggardly of the good things. These have not believed, therefore Allah has made their doing naught; and this is easy to Allah.