It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever takes care of an orphan, whether his own or someone else's, Paradise becomes binding for him, unless he has done a deed that is not forgiven. And whoever loses his two precious eyes, Paradise also becomes binding for him, unless he has done a deed that is not forgiven."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11766