Prophet Muhammed (pbuh) said:

“There is a Sadaqa to be given for every joint of the Human Body; and for every day on which the Sun rises there is a reward of a Sadaqa for the one who establishes justice among people.”

Sahih Al Bukhari Vol. 8, Book 73, Hadith 84

“If any one of you improves in (following) Islam then his good deeds will be rewarded ten times to seven hundred times for each good deed and a bad deed will be recorded as it is”

Sahih Al Bukhari Vol.1, Hadith No.42

“When a man dies, his acts come to an end, but three, recurring charity, or knowledge (by which people) benefit, or a pious child, who prays for him”

Sahih Muslim Vol.3, Hadith No. 4005

“Whoever is easy with (a debtor) who is in difficulty, Allah will be easy with him in this world and in the Hereafter”

Sunan Ibn Majah Vol. 3, Hadith No. 2417