Musnad Abu Ya'la al-Mawsili 117:243

Zuhayr narrated to us, Affan narrated to us, Hammad narrated to us, Thabit informed us, from Anas, that the Messenger of Allah (may Allah bless him and grant him peace) was met one day by the boys of the Ansar and the slave girls. He said, "By Allah, I truly love you."