There is a hadith about the virtue of taking care of a yateem*:

From Sahl bin Sa’ad (may Allah be pleased with him), he said: “The Messenger of Allah (peace be upon him) said: “I and the one who looks after a yateem* will be like this in Paradise,” (showing his middle and index fingers raised together). *[orphan or child in need of parental care]

[Sahih al-Bukhari Book 68, Hadith 53]