إِنَّ ٱللَّهَ لَا يَظْلِمُ مِثْقَالَ ذَرَّةٍ ۖ وَإِن تَكُ حَسَنَةً يُضَـٰعِفْهَا وَيُؤْتِ مِن لَّدُنْهُ أَجْرًا عَظِيمًا Qur’an An-Nisaa' (4:40)Inna All a ha l a ya th limu mithq a la th arratin wain taku h asanatan yu da AAifh a wayuti min ladunhu ajran AAa th eem a n
Lit., "from Himself" - i.e., far in excess of what the doer of good may have merited.
lit., the smallest particle of dust (ⱬarrah).
Any little good of our own comes from the purity of our heart. Its results in the world are doubled and multiplied by Allah's grace and mercy; but an even greater reward comes from Him: His good pleasure, which brings us nearer to Him.