Thabit narrates from Sayyiduna Anas (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) came to us, and in the house were I, my mother and my maternal aunt Sayyidah Umm Haram (may Allah be pleased with her). He (peace and blessings be upon him) said: "Stand up, so that I may lead you in prayer." It was not the time of a prayer. A man said to Thabit: Where did Sayyiduna Anas (may Allah be pleased with him) stand? He said: On his (peace and blessings be upon him) right side. Then he (peace and blessings be upon him) supplicated for the household for the good things of this world and the Hereafter. My mother said: O Messenger of Allah, this is your (peace and blessings be upon him) little servant; supplicate for him too. So he (peace and blessings be upon him) supplicated for me for every good. The last supplication he (peace and blessings be upon him) made for me was: 'Allahumma akthir malahu wa waladahu, wa barik lahu fihi' (O Allah, increase his wealth and children, and bless him in it).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4926