[4:40] Surely God shall not wrong so much as the weight of an atom; and if it be a good deed, He will double it and give from Himself a great wage.
He does not deprive them of anything in their reward, but rather is first with his bounty for them, without them being deserving, and He doubles the wages for their works. As for wrongdoing, it is impossible to describe His decree this way because the creation is His creation and the kingdom is His kingdom. The wrongdoer is one who transgresses a limit which has been prescribed for him. This would be an impossible way to describe His might in the glory of His measure.