Musnad Abu Ya'la al-Mawsili 112:23

Muhammad ibn Abdullah ibn Numayr narrated to us, Abu Mu'awiyah narrated to us, Isma'il ibn Muslim narrated to us, from al-Hasan, from Anas, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "The most beloved of names to Allah are Abdullah, Abd al-Rahman, and al-Harith."