So then, whenever we have an opportunity, let us do good to all people, and especially to those who belong to the family of faith.
The Christians love one another. They do not neglect widows. Orphans they rescue from those who are cruel to them. Every one of them who has anything gives without reserve to the one who has nothing. If they see a traveling stranger they bring them under their roof. They rejoice over them as over a real brother or sister, for they do not call one another brothers and sisters after the flesh, but they know they are siblings in the Spirit and in God.
If one of them sees that one of their poor must leave this world, they provide for their burial as well as possible. And if they hear that one of them is imprisoned or oppressed by their opponents for the sake of their Christ’s name, all of them take care of all that person's needs. If possible they set them free.
If anyone among them is poor or comes into want while they themselves have nothing to spare, they fast two or three days for them. In this way they can supply any poor person with the food they need.
Apology of Aristides, Chapter 15 (c. AD 124)