Musnad Abu Ya'la al-Mawsili 117:54

Hadaba narrated to us, Sulayman ibn al-Mughira narrated to us, from Thabit, from Anas, who said: The Messenger of Allah (peace and blessings of Allah be upon him) came to us, and there was no one there but me, my mother, and my maternal aunt, Umm Haram. He said, "Stand up, so that I may lead you in prayer," and that was at a time other than a prayer time. A man said to Thabit, "Where did he place Anas?" He said, "To his right." He said: So he prayed for us, the people of the house, for every good from the good of this world and the Hereafter. My mother said, "O Messenger of Allah, your little servant Anas, pray to Allah for him." So he prayed for me for every good, and the last of what he prayed for me was: "O Allah, increase his wealth and his children, and bless him in them."