There is a hadith about the virtue of taking care of the orphans:

From Sahl bin Sa’ad (may Allah be pleased with him), he said: “The Messenger of Allah sallallaahu ‘alaihi wa sallam said: “I and the one who looks after an orphan will be like this in Paradise,” showing his middle and index fingers and separating them.”

[Sahih al-Bukhari : Book 68, Hadith 53]