Sadaqah

السلام عليكم
بِسْمِ اللهِ الرَّحْمنِ الرَّحِيمِ
Abu Hurairah (May Allah be pleased with him) reported: Messenger of Allah (peace be upon him) said, "Every day the sun rises charity (Sadaqah) is due on every joint of a person: you administer justice between two men is a charity; and assisting a man to mount his beast, or helping him load his luggage on it is a charity; and a good word is a charity; and every step that you take (towards the mosque) for Salat (prayer) is a charity and removing harmful things from the road is a charity".
[Al-Bukhari and Muslim].

In Muslim, it is reported on the authority of `Aishah (May Allah be pleased with her) that Messenger of Allah (peace be upon him) said, "Everyone of the children of Adam has been created with three hundred and sixty joints; so he who declares the Glory of Allah (i.e., saying Allahu Akbar), praises Allah (i.e., Al-hamdu lillah), declares Allah to be One (i.e., La ilaha illallah), glorifies Allah, and seeks forgiveness from Allah (i.e., Astaghfirullah), and removes stone, or thorn, or bone from people's path, and enjoins good and forbids evil, to the number of those three hundred and sixty, will walk that day having rescued himself from Hell".

Commentary: This Hadith also tells that even a person who does not have the capacity to pay Sadaqah (charity, alms, propitiatory offerings, etc.) can also pay it in the manner prescribed above and earn its reward. Moreover, he can also pay alms for the joints in his body.