Allah does not wrong a believer in a good deed; he will be given on account of it in this world and will be rewarded for it in the Hereafter

The Prophet (may Allah's peace and blessings be upon him) demonstrates the great favor of Allah towards the believers and His justice towards the disbelievers. As for the believer, He does not diminish the reward of any good deed he performs. Rather, He gives him a reward for it in this world in return for his obedience, in addition to the reward He keeps in store for him in the Hereafter. He may also keep the whole reward for him in the Hereafter.

As for the disbeliever, Allah gives him the reward for his virtuous deeds in the form of good things in this life. But when he goes to the Hereafter, he will have no reward. This is because the good deed that brings benefit in this world and in the Hereafter must be performed by a believer.