Anas (r) reported: The Messenger of Allah (s) said, "I and anyone who brings up two girls to maturity will be like these two on the Day of Rising," and he put his fingers together. [Muslim]
Abu Hurayrah (r) reported: The Messenger of Allah (s) said, "He who takes care of an orphan, whether he is a relative or a stranger, will be in Jannah (Paradise) with me like these two." The narrator, Malik bin Anas (r), raised his forefinger and middle finger for illustration. [Muslim]
A man once came to the Prophet (s) and complained that he felt hardness in his heart. The Prophet said, "Do you want your heart to become soft and that you acquire what you need? Be merciful with the orphan, pat his head, and feed him from what you eat. This will soften your heart, and enable you to get what you need." [at-Tabarani]
ISCA is currently coordinating sponsorship of orphan girls in Indonesia.