Mukhtasar Muslim

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: Allah Almighty does not wrong a believer for even a single good deed; He rewards him for it in this world and will also reward him in the Hereafter. As for the disbeliever, he is given the reward for his good deeds in this world, so that when the Hereafter comes, he will have no good deed left for which he may be rewarded.