﴿ وَأَمَّا مَنْ ءَامَنَ وَعَمِلَ صَٰلِحًۭا فَلَهُۥ جَزَآءً ٱلْحُسْنَىٰ ۖ وَسَنَقُولُ لَهُۥ مِنْ أَمْرِنَا يُسْرًۭا ﴾

“But as for him who believes and does righteous deeds - he will have the ultimate good [of the life to come] as his reward; and [as for us,] we shall make binding on him [only] that which is easy to fulfill."”

But as for him who believes and acts righteously he shall have the fairest reward namely Paradise the annexation construction jazā’u l-husnā ‘the fairest reward’ is explicative; a variant reading has jazā’an al-husnā ‘he shall have as a requital that which is fairest’; al-Farrā’ said that this accusative reading of jazā’an is intended as an explanation of the nature of the requital by way of attribution to ‘that which is fairest’; and we shall speak to him mildly in our command’ that is to say we shall command him with what he will find easy to bear.