Hazrat Safwan bin Sulaym (may Allah have mercy on him) said: The Messenger of Allah (peace and blessings be upon him) said: "I and the one who looks after an orphan, whether his own or another's, while fearing Allah, will both be in Paradise like this," and the Prophet (peace and blessings be upon him) pointed, joining his middle finger and the one next to it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الوصايا / 12663