Musnad Abu Ya'la al-Mawsili 42:82

Uthman ibn Abi Shaybah narrated to us, Imran ibn Abi Layla narrated to us, from his father, from Atiyyah, from Abu Sa’id, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, Allah is Beautiful and He loves beauty, and He loves to see the effect of His favor upon His servant."