Sahih Muslim Book - 50, Hadith - 7089

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِى شَيْبَةَ وَزُهَيْرُ بْنُ حَرْبٍ - وَاللَّفْظُ لِزُهَيْرٍ - قَالاَ حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ أَخْبَرَنَا هَمَّامُ بْنُ يَحْيَى عَنْ قَتَادَةَ عَنْ أَنَسِ بْنِ مَالِكٍ قَالَ قَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « إِنَّ اللَّهَ لاَ يَظْلِمُ مُؤْمِنًا حَسَنَةً يُعْطَى بِهَا فِى الدُّنْيَا وَيُجْزَى بِهَا فِى الآخِرَةِ وَأَمَّا الْكَافِرُ فَيُطْعَمُ بِحَسَنَاتِ مَا عَمِلَ بِهَا لِلَّهِ فِى الدُّنْيَا حَتَّى إِذَا أَفْضَى إِلَى الآخِرَةِ لَمْ تَكُنْ لَهُ حَسَنَةٌ يُجْزَى بِهَا ».

It was narrated that Anas bin Malik said: "The Messenger of Allah (s.a.w) said: 'Allah does not treat the believer unjustly with regard to his good deeds. He blesses him because of them in this world and He will reward him for them in the Hereafter. As for the disbeliever, he is fed because of the good deeds that he does for the sake of Allah in this world, then when he passes on into the Hereafter, he will have no good deeds left for which to be rewarded."'