Those needy ones who are wholly wrapped up in the cause of Allah, and who are hindered from moving about the earth in search of their livelihood especially deserve help. He who is unaware of their circumstances supposes them to be wealthy because of their dignified bearing, but you will know them by their countenance, although they do not go about begging of people with importunity. And whatever wealth you will spend on helping them, Allah will know of it.
Narrated by: Abu Huraira
Allah's Apostle said, "If one give in charity what equals one date-fruit fro the honestly-earned money and Allah accepts only the honestly earned money --Allah takes it in His right (hand) ar then enlarges its reward for that person (who has given it), as anyone of you brings up his baby horse, so much s that it becomes as big as a mountain