The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fada'il Al-Sahabah)
Muslim :: Book 31 : Hadith 6064
Anas b. Malik said: Allah's Messenger (may peace be upon him) passed (by our house) that my mother Umm Sulaim listened to his voice and said: Allah's Messenger, let my father and mother be sacrificed for thee, here is Unais (and requested him to invoke blessings upon me). So Allah's Messenger (may peace be upon him) invoked three blessings upon me. I have seen (the results) of the two in this very world (in regard to wealth and progeny) and I hope to see (the result) of the third one in the Hereafter.