The Women
إِنَّ ٱللَّهَ لَا يَظْلِمُ مِثْقَالَ ذَرَّةٍ ۖ وَإِن تَكُ حَسَنَةً يُضَـٰعِفْهَا وَيُؤْتِ مِن لَّدُنْهُ أَجْرًا عَظِيمًا
Indeed, Allah does not do injustice, [even] as much as an atom's weight; while if there is a good deed, He multiplies it and gives from Himself a great reward.
Nearby ayahs help place verse 4:40 in sequence and meaning.
وَٱلَّذِينَ يُنفِقُونَ أَمْوَٰلَهُمْ رِئَآءَ ٱلنَّاسِ وَلَا يُؤْمِنُونَ بِٱللَّهِ وَلَا بِٱلْيَوْمِ ٱلْـَٔاخِرِ ۗ وَمَن يَكُنِ ٱلشَّيْطَـٰنُ لَهُۥ قَرِينًا فَسَآءَ قَرِينًا
And [also] those who spend of their wealth to be seen by the people and believe not in Allah nor in the Last Day. And he to whom Satan is a companion - then evil is he as a companion.
وَمَاذَا عَلَيْهِمْ لَوْ ءَامَنُوا۟ بِٱللَّهِ وَٱلْيَوْمِ ٱلْـَٔاخِرِ وَأَنفَقُوا۟ مِمَّا رَزَقَهُمُ ٱللَّهُ ۚ وَكَانَ ٱللَّهُ بِهِمْ عَلِيمًا
And what [harm would come] upon them if they believed in Allah and the Last Day and spent out of what Allah provided for them? And Allah is ever, about them, Knowing.
فَكَيْفَ إِذَا جِئْنَا مِن كُلِّ أُمَّةٍۭ بِشَهِيدٍ وَجِئْنَا بِكَ عَلَىٰ هَـٰٓؤُلَآءِ شَهِيدًا
So how [will it be] when We bring from every nation a witness and we bring you, [O Muhammad] against these [people] as a witness?
يَوْمَئِذٍ يَوَدُّ ٱلَّذِينَ كَفَرُوا۟ وَعَصَوُا۟ ٱلرَّسُولَ لَوْ تُسَوَّىٰ بِهِمُ ٱلْأَرْضُ وَلَا يَكْتُمُونَ ٱللَّهَ حَدِيثًا
That Day, those who disbelieved and disobeyed the Messenger will wish they could be covered by the earth. And they will not conceal from Allah a [single] statement.