[13].Surah Ar-Ra'd [The Thunder] : Ayat 26

Ayat 26. Allah increases the provision for whom He wills, and straitens (it for whom He wills), and they rejoice in the life of the world, whereas the life of this world as compared with the Hereafter is but a brief passing enjoyment. 

Hazrat Anas (May Allah be pleased with him) reported: Messenger of Allah  [SAWW](PBUH) said, "When an infidel accomplishes any good deed, he is rewarded for it in this world; and in the case of a Muslim, Allah stores up his good acts for him in the Hereafter and provides him with subsistence in this life due to his obedience.''

[Muslim Book 039, chapter 11, Hadith # 6739].

Another narration is: Messenger of Allah  [SAWW](PBUH) said, "Allah does not wrong a believer a good deed because he is given blessings for it in this world and will be rewarded for it in the Hereafter. But the infidel is given in the world the reward for good deeds, he has performed for the sake of Allah and when he comes to the Hereafter, there is no good deed for which he can be rewarded".

[Muslim Book 039, chapter 11, Hadith # 6740]. 

Lesson : as mentioned above in Surah Ar-Ra'd Ayat 26. "they rejoice in the life of the world, whereas the life of this world as compared with the Hereafter is but a brief passing enjoyment. The infidels also do in this world many works which are for public welfare, or which come under the category of good deeds. Almighty Allah gives them reward for such good deeds in this world in the form of wealth, sound health, or saving them from some trouble, because Belief is precondition for reward in the Hereafter. Since an infidel is deprived of it, he will also be deprived of their reward in the Hereafter. Thus, we learn that Belief constitutes the basis of every action and is a precondition for the acceptance of any good deed by Allah.